So, I have an MI Audio Blues Pro. I believe it is Ver 2, and I've had it for 5 years. I absolutely this pedal, but it starting producing a loud hum through my amp when plugged in whether I've kicked it on or not. Here's the troubleshooting I've done. The pedal is the only thing between my guitar and amp I have tried a number of different patch cables when used with other pedals. I've also used different guitar cables I tested my setup with a different OD pedal and have removed OD pedals from the chain altogether I continue to get the same amount of hum with a power supply or with a battery It happens in different rooms Anything else you guys can think of for me to test? Any ideas on what the problem could be? I'd love to be able to fix it myself, but I've only done wiring on guitars.