Okay I am having a heck of a time trying to figure out what I'm doing wrong. When printing with my DTG on dark shirts, I get a hairy residue after the white ink underlay, and when i cure the ink the white hairs pop through the colors. Now this only happens with darks, when I use black shirts I don't have this problem. Now I was told that it's the pretreating the fabric, so why doesn't it happen with black shirts.