I don't use silica but for the most part I think people that use silica space their wraps. Maybe this is so just because silica is a little harder to slide thru a micro coil. As for taste, with cotton, I have tried it both ways and fond it overall better with close wraps. As for taste between tight or loose coils with silica? Haven't compared but maybe the silica doesn't work as well in micros because of the intensity of the micro coils. Micros do tend to be a little hotter so maybe the silica doesn't wick like the cotton does
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