Use turbo! (shift click green flag) Power Wash Simulator in Scratch! Click and hold to clean. Q and A to change nozzle W to increase size, and S to decrease. For rotatable nozzles, Z to rotate anti-clockwise, and X for clockwise. The power of the cleaning decreases the larger the nozzle.
Water spray sound (because license is CC-BY): https://freesound.org/people/meisterjaan/sounds/323485/ Recently got a power washer, and decided to replicate it in scratch. It kind of looks like minecraft because the texture is only 96x72. I might make a higher resolution one. The clean and dirty textures are procedurally generated.