Reason for coffee filters over other products has nothing to do with static and everything to do with Lint. Paper towels, TP, etc once moisture hits them leave large amounts of particle lint. Most of the lint requires a magnifying glass to see. Once the paste is applied, and you stick the cooler on the lid, that lint becomes an insulator as it has very bad thermal transfer properties. When you consider the millions of transistors in a cpu and the nano-size of them, anything that prevents heat transfer is going to create a Hotspot and you run a high chance of burning out portions of the cores, reducing life expectancy, OC ability, stability etc. Coffee filters are as lint free a product as is commercially available to the public.