I recently installed a new one in my latest strat and I haven't noticed any problems. I noticed you said blasters, are you getting it with more than one? When you say volume at zero, do you mean the guitar volume or the blaster gain? If it's just one guitar, I'd say double check your wiring, grounds, shielding etc. If it's happening in more than one, is it only at one location? If not there may be something in that environment that's causing it.