I made the mistake of loaning my grime buster to some friends and it has been returned broken, what happens is when it comes up to pressure the steam just shoots out of the brush and the screw in cap, the green light doesn't come on and the bottom switch and the trigger on the handle have no control of the steam, I had to place the steamer outside until it had run out of steam. I daren't use it, is it reparable?