I found this laundromat while on travel. It's cash only even though there is a tap to pay machine but it doesn't work. They sell detergent in a vending machine and you control the washer and dryer through one central center.
It's 6 euros for a small load and 12 euros for a large load. The dryer is one eoro for 8 minutes. I did one large load and it took 24 minutes to dry.
At the payment center you enter your money, which can be coin or cash, then enter the number of your machine and hit the green check. Then you can start your wash or dry.
Pretty convenient to use during travel and everything inside is clean. There is one sign in English and everything else is in Dutch so translating apps help. read more