Again Jeff from Sinclair window cleaning , did a fantastic job!! We have had him for years now and hopefully many more .. Right on time and fast, sparkling windows and even does solar panels if early morning appt .. Having hummingbirds and a Husky , he had his job cut out for him but did a beautiful job and fast .. Thank you Jeff From the Chavez family read more

Great job as always, thanks Jeff! Our house has a tremendous amount of windows and we are so grateful for him.

Jeff does amazing job cleaning our windows and solar panels. Always sends me reminders. Very kind and friendly.

Jeff showed up on time and got right to work. He had a mask on and work shoe covers. He went over everything with me before he started. Did a great job. Windows look great read more

We did a home renovation before we moved in to our new house, so as you can imagine, there was a lot of dust and dirt left over from the remodeling. We decided to give Sinclair Window Cleaning a call to clean the windows and sliding doors. We have a lot of windows and sliding doors, and as I said, they were pretty dirty, so it took Jeff two trips to finish the entire job, but the windows have probably never been this clean in a really really long time. Amazing job! I have already recommended him to multiple people and will call again when our windows are no longer shining like they should be. read more

Professional and courteous, Jeff will leave your windows sparkling clean. Have used him for years and will continue to do so. Give him a call - if you want the very best. read more

Just want to add another 5 stars review to Jeff's service. He professionally cleaned my rental windows and shower stall glasses. Most of the good things have been said by other reviewers so I don't to repeat them. For the shower glasses, even it's not 100% rid of hard water spots, but I haven't seen it this clean since I bought the house new 12 years ago. Photo attached-see for yourself. This was charged separately from windows service. Even though my wife said it's expensive but I think it's worth it! (Note: I didn't shop for another quote I picked Jeff just from Yelp reviews) read more

Sinclair Window Cleaning - Cleaned shower glasses - Window Washing Near Me - Rancho Cucamonga, California

We've been using Jeff's services for years and he's alway prompt, reliable, and does high quality work. He cleans our many windows, gutters, roof, and hangs Christmas lights, all for a very reasonable price. read more

Used Jeff again today and can't tell you enough about what a good job he does. My windows are absolutely sparkling and ready for our fundraiser here on Saturday night. If you need a wonderful, friendly and professional window cleaner, Jeff Sinclair is your man! read more

As good as it gets!! Jeff is a great guy, friendly, responsible, AND he does a fantastic job. He is diligent and does more than just "clean your windows"; he takes care of the screens without damaging them, cleans the tracks, and lubricates the frames! He's fast and efficient and is the essence of a small business with big service! We've used Jeff for years and have always been more than satisfied and are confident that you will be as well. read more

Jeff did my window 2weeks ago,now my house looks more bright than before.he even repaired few screens for me. He is very nice person,easy talk to. He is professional. He tell me where can I get my broken window repaired.also his price is fordable. I can't wait for next window cleaning. read more

I've hired Sinclair Window Cleaning to take care of my windows, slider, screens, and tracks for about 5 years now . Truly outstanding! I have a two story condo and I hate dirty windows. They are sparkling clean after his job and seem to stay cleaner longer. My neighbors started using him too! read more

My windows sparkled when he was done! The owner was super helpful by rescheduling last-minute around a couple of rainstorms. Reasonable price, very personable, quick and thorough! read more

Always on time, pleasant and super professional! A wonderful family own business! Jeff is fantastic, so fast and efficient! When he's done my windows shine, my screens look like new and the window tracks look amazing! Superb job Jeff! read more

I have been using Sinclair Window Cleaning for several years now. I am never disappointed. My windows always sparkle and look phenomenally clean when the job is done. I highly recommend this service to anyone who wants quality work at an exceptional price! read more

Jeff at Sinclair Window Cleaning was able to get me a quote that was quite a bit less than my current window cleaners. He also does the job more thoroughly and leaves my storefront looking brand new. I highly recommend Sinclair Window Cleaning to other business owners. read more

Wow! Jeff did an awsome job on our 60 year old windows! He was professional and courteous. Windows, tracks and screens all look great. Our entire house looks bright and cheery. We will definitely be calling Sinclair again next year. read more

My experience was most positive. Came when expected, worked hard and did a great job. Vacuumed and cleaned tracks, even hard to reach sills. Windows and screens sparkle like never before. Worth it on an annual basis. Thanks for your hard work. read more

I was never able to get in touch with this compant after I had purchased a coupon from Groupon. I tried several times over a 6 month period. I couldn't even leave a message. I ended up getting a refund of my money from Groupon. Never again. read more

We just hired Sinclair Window Cleaning to keep our office front looking professional. They cleaned our windows and red awnings. We were especially impressed on how clean and new our red sun-beat awnings look again. Jeff was prompt on providing us a bid (that was in our budget) when we requested it and was able to get our windows cleaned for us fast. We have purchased another building with a lot more windows, not only will we have him serve us when we move, but we will also recommend him to the next company that moves into our building. As a family owned business we appreciate other small business owners who provide quality service. Looking forward to a long relationship with this business. read more

Jeff did a great job and our windows look new again! I really appreciated how he wore booties on his shoes when he was cleaning inside the house. He even used the pressure washer to clean our garage door. We will definitely be calling him again! read more

Jeff did a great job for us! He is very thorough... not only cleaning the windows, but he also cleaned the tracks and washed the screens. He was courteous, professional and efficient. His prices are fantastic! I would highly recommend Jeff to anyone who needs their windows cleaned. read more

Had my windows cleaned after I moved into my house and Jeff did an amazing job. The windows looked brand new. Definitely recommend him for your home or business. read more

"I can see clearly now.... my windows are clean!" I've become so accustomed to dirty windows, I've forgotten how nice it was to look outside during a beautiful Cali day. What a waste! Thanks to Sinclair Windows, my clients and I can now enjoy the natural lighting which has been so rudely blocked by 10 years of caked on grime from previous tenants. Their service is affordable, quick and of great quality. Highly recommended from me to you. read more

Excellent work, great customer service, and fair prices. I look for all three and was not disappointed. Jeff showed up on time and was friendly and professional. My windows were very dirty because they had not been cleaned in years and Jeff had them sparkling! What a difference! I even got a new screen and it looks great too. You won't be disappointed with this company. I'm recommending this company to yelp users and all my family and friends. By the way I found out about Sinclair Windows from Yelp and that was my first time using Yelp. Thanks Yelp!I read more

Wow! What a difference! Sinclair Window Cleaning does an amazing job! My Windows look brand new! Jeff was in and out of our home, cleaning all of our two-story home's windows, tracks, and screens in 4 hours. He was friendly, efficient, and professional! I highly recommend this company, you won't be disappointed! read more

Jeff did my windows today. I am so pleased with his work. My windows sparkle. He is honest and very professional . I would highly recommend him to anyone who needs their windows cleaned. read more

Have used Sinclair Window Cleaning twice since my original review. Still very happy with Jeff's work!

Best decision I could have made. My windows and screens are so clean you have to look twice to make sure there is glass in the frames. Jeff was prompt, courteous, and the quality of his work was outstanding. I will use Sinclair Window Cleaning every time my windows require cleaning. read more

I needed someone to come out and clean the water spots off my windows and make them sparkle on a rental property I have. I read the reviews on yelp and decided to call for a estimate. Jeff was nice and professional and agreed to do my windows whenever it was convent for me. I wanted my windows to sparkle for my new tenants that are moving in next month. He arrived on time and cleaned them perfectly. I was very happy and will be using him again for my home. read more

Great Window Washers! Price was right, they came on time, cleaned up after themselves as they moved along (see what I did there?) I would (and have) recommended them read more

Great customer service, friendly, punctual & thorough. Would gladly refer them to anyone!!

Found Sinclair windows on Yelp after my last window cleaner had a disconnected number (Sorry HD Windows, I really liked you to..). He came out and gave me a great price on window and awning cleaning. Came the following day, on time and did a great job on cleaning the windows and my really dirty awnings. He was professional and cleaned up not only my windows but after himself which is a pet peeve of mine. Highly recommend! read more

Wow, Jeff exceeded my expectations. What a value too! He cleaned windows on the inside and out...the outside windows upstairs haven't been touched in years so they were filthy! They look great now and it's so nice to have windows that let more light in. He even fixed one of my screens! I will certainly use him again and next time I won't wait so long since the price is so reasonable. read more

Jeff gave my windows a new life for a great price! I'm so pleased!! Definitely going to use again.

Wow, wow, wow!!!!! I am ashamed to admit that my windows have NEVER been cleaned and I have lived in this house almost 13 years, so you can only imagine the state they were in. I even told Jeff that I was not expecting miracles and to just do the best he could. Jeff was outstanding! He came on time (in fact a few minutes early), cleaned my windows inside and out, left no mess and was very professional. To say my windows are clean is an understatement. I have 19 windows and they look like they are new. The screens are immaculate. I highly recommend Sinclair Window Cleaning, I would use him again in an instant. Thank you for a job well done! read more

Jeff is the best had our windows washed in South Ontario and they came out perfect. Then it rained, but no sweat Jeff came back and made them right again. Thanks again Jeff. You ROCK... read more

Jeff did an awesome job cleaning our windows our windows had not been cleaned in over eight years they were disgusting but Jeff took on the challenge and did an amazing job he spent over four hours cleaning our windows, tracks and screens very diligently they look amazing and the price was affordable thanks again Jeff for doing such an amazing job. Keep up the good work read more

First time having our windows and screens professionally cleaned and it was well worth it. Jeff cleaned all of our windows, screens, and tracks both inside and out. He showed up with his fully-equipped truck (ladders, hoses, vacuums, water pressure tanks, you name it) and did a fantastic job in three hours. He was professional, personable, and knowledgeable. If you are in need of this kind of service (and you probably are if you live in Rancho) look no further than Sinclair Window Cleaning. Highly recommended! read more

Jeff @ Sinclair Window Cleaning came and cleaned our windows and skylights! We also had him re-screen almost all our window screens... I cannot tell you how nice it is to be able to open our windows without having to worry about creatures coming in through the holes in the screens! Highly recommended... read more