If you’re using single coil pickups, there will always be some hum. I know from my own experience that you need a really good power supply for most EH pedals. I got a cheap power supply with my Holy Stain when it came from Guitar Center and it sounded like crap (I didn’t order it, they just sent it). I thought something was wrong with the pedal! The clean setting made more noise than the fuzz or distortion and the reverb sounded like hell! I then got a good power supply out and it fixed everything. No more hum and noise. This is just my experience. It might not be yours, but I do hope it helps.