Have used it perhaps a dozen times at most. Left my machine on the patio one afternoon, to air dry the hose, and forgot to bring it in at night. It rained overnight. Brought it in and dried it off as soon as I discovered it. It was not in any standing water, and it was upright so that water could not enter the vents directly, but I was concerned. I phoned the recommended nearest repair shop, and was told that it was probably alright to use. Have not had to use it, since. Any suggestions? Because of mobility issues, I am unable to kneel or squat to clean floors, but using my Little Green while bending over at the waist works for me. I just have to do a little at a time. It would be helpful to have a rigid extender to place between the nozzle part and the hose.