I would agree with cleaning it first off. They get gummy, dog hair, dust, etc. in them. I am a transcriptionist and I also have to clean my wav pedal out from time to time, and you wouldn't believe what all gets in them. I also agree with keeping it unplugged when not in use. I do that anyway but especially with one that might have a problem. Sorry for your aggravation, I know how annoying it is when your machines don't work just right.