Hello. I have the Holy Grail Plus, have had it about 6 months.

At first no problems. About a month ago it would start a loud hum when activated after an hour or two of playing. When I would shut the pedal off the hum would disappear.

I have recently incorporated it into a loop switcher/midi pedal rig and the hum has gotten worse. Still takes about an hour or two before the hum/buzz started but was even causing buzzing when I had the loop it was located on bypassed.

Everything powered with Voodoo Labs Pedal Power 2+, i’ve got 6 other pedals plugged into the same power supply.

Any advice is appreciated, thanks!