I am five very dirty places and a jet of water. Hold down and move it over the dirt. Go slow and it leaves a clean stripe. The mud runs down in drops, and when a part is completely clean it squeaks and shines. The dirt pays coins for bigger tools: a pressure washer for the car, a turbo nozzle for the greasy stove, and a surface cleaner for the terrace floor. No timer. Nothing to lose. Just ohh. 💧