I picked up a few packs of the LR 510D boge cartos. I noticed when I pulled the white cap off, there was some black along the sides of it. I wiped it off and I filled it with 25 drops last night and just tried a few puffs of it and it tastes NASTY!!! I believe these ones are the 2.0 ohms, which I have never tried before, but I have used the 1.5 and the SR ones before (not from Health Cabin though) and they didn't taste off at all. Do these come with primer, and if so, how the heck are you supposed to clean them??