Ok, here's the situation. I've been using carto tanks for the last 2-3 years cuz they work and I'm lazy. Don't want to mess with a system that works for me, however, as we all know ... Cartos are becoming hard to find. I recently ordered some from Ikenvape bcuz I read a blog from someone popular on here recommended them. Seems the "fill" inside will not absorb the liquid like boges do. It just sits there not soaking in at all. I've tried condom method and let it sit for an hour and it seemed to semi work but when I went to fire it up I get NOTHING! It's on a Provari so I checked ohms and got error "OP". Tried same carto on a different Provari, same error. Put different carto tank on both Provaris, no problems. Any ideas? I'm not liking these Ikenvape cartos so far AT ALL!