better grounding definately, I had the same problem, just make sure you have good shieled wires and the power you're connected to has good grounding. How old is your house? I bought a Monster Power strip with the "clean power technology" and it took it out completely. Try that, go to radio shack. They have them, just get the cheapest one. it's about $75. If you have good ground in your house the strip should take care of everything else.
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