That is a very typical problem with that pedal. Mine did it so bad one time, that it would get completely stuck. I took it apart, and took the switch out and took it apart and put it back together again... worked fine after that. Now, on occasions, if I don't click it hard enough, it will do that week signal thing, but stepping on it again will get it straight. I'd suggest contacting MXR about it. If they won't repair or replace it for you for free, maybe they'll send you a new switch.