I have been building 1.6ohm microcoils and using cotton as a wick. With clear juices like blue voodoo and gray matter I dont seem to have any issues. I can vape two or more tanks an when i check my wick it is just slightly off color at the point of contact in the coil. However using a dark juice i cant make it a quarter tank before the cotton is scorched and falling apart. For example, last night i put in new cotton and filled up with AiV 15 foot falls. At first the taste was great but by morning it was disgusting. I pulled it all apart and sure enough the cotton was so burned that it basically crumbled when pullin it out. I was wondering what you guys would recommend for this thing when using darker juices?