I have POG pedal (the full sized one, not the smaller one).

When I have played around with it for a bit at home with a practice amp, it works wonderfully, however when i use it with my full guitar rig, over time a humming noise developes that increases in volume and eventually becomes so loud you cant hear anything but it.

there’s obviously something that needs to fixed, perhaps re-soldering, etc but has anyone else come across a similar problem? any suggestions on where i could take/send the pedal to get fixed?

thanks in advance