I get the black jelly build up in my grand drip cup. I clean it out every few days with a que tip. I was assuming it happens to everyone, but maybe it is the type of
juice I use. I use a lot of Timmys double double. For me it's definately not pocket lint
.While I'm not surprised to get the build up of sludge, it does make me wonder if theres a similiar build up in our lungs from it?