I have a Vox V848 Wah. It is my first and only wah. I don't use it much. It has probably been a year since last use. Today I plugged it in and I think it might be broken. It still passes signal but there is almost no sweep. Even when the toe is all the way forward it is still quite dark. I remember the pedal as having quite a bit of sweep in the past and the toe down position was painfully bright. Any idea what might be causing the sudden change? There is nothing else in the signal path and it is running off a PP2+ with the appropriate cable.