I have a Zoom B1 that is acting crazy. it switches patches on it's own, the numbers on the display are flashing real fast and it's not responding to nay commands. I've had in the past the 506 and the 506II or whatever the older models were... do these pedals have a "life-expectancy"? ... and then they go bad? i can't think of anything that could have affected these pedals... is there anything I can do myself? thanks in advance.