I'll second the resurrectors. My go-to carto along with the Boges. I have had more problems with clear cartos than any other kinds, be it the ce2, dual coil, etc. I think many have had these problems. I do like being able to see the juice level and stuff, but it seems like the plastic tubing causes a lot of issues, although it might be something else. The Boges and Resurrectors are rock solid.