Just copying and pasting the directions I sent to my aunt on how I do it:
Lay down a paper towel and get together your cartomizers. Also grab a cup and fill with hot water.
Pull apart cartomizers, u can use a toothpick or something like that to take the caps off. In the cup of hot water put the carto caps, inner plastic ring, dirty condom caps and dirty drip tips. (Things u shouldn't boil). U may want to use gloves while taking apart ur cartos if u don't want to get the nic
juice on u. If u absorb a lot of that
thru ur skin u could get nic overdose symptoms.
After u have taken cartos apart drain of excess
juice and rinse them out. If u see burnt filling, toss.
Use an old pot u don't care about and a drainer that can sit IN the pot while it boils. Some cartos are ruined if u just put directly on bottom of pot where heat is. So I bought this drainer for a couple bucks that sits in the pot and keeps the cartos off the direct heat of the bottom. I got a cheapie one that looks like this from walmart that I only use for carto cleaning:
Good Grips Double Rod Strainer Stainless Steel 6" 38891
Boil water in pot. Add cartos to drainer under water line. Boil for 15 mins. Drain and rinse under lukewarm water. Repeat 2 more times, but for final drain and rinse of cartos, pour cup of drip tips, tops, etc into drainer too and rinse everything thoroughly.
Lay down a paper towel or 2. Put on it the tops and rings, condoms upside down to drain, blow out drip tips into sink and let drain on paper towel. Wipe down outsides of drip tips to avoid juice spots. Take cooling down cartos and wipe them off outsides with paper towels well so u don't have juice spots on them later. Then go to sink and blow out each carto really well. Blow into mouth piece and let water go out of battery end. VERY IMPORTANT STEP TO GET OUT THAT WATER!!
Set oven at 175. Put cartos on baking sheet, mouthpiece down, battery ends up. Don't just lay them down sideways on sheet. Bake for 30 mins. Take out and let cool. I am still experimenting with how long to bake so they are ready to use instantly. May want to let them sit at LEAST overnight too. If u try next day and draw is tight or u get a bad taste, they are probably still not dry enough.
If u have any questions, please let me know! This is a good video to watch:
Cleaning a cartomizer by boiling - YouTube He does not use a metal drainer in the pot, I saw that from a different video, and I do think it helps. I think it is important to not expose the atomizer at the battery end to direct extreme heat like the bottom of the pot right about the flame on the stove, or the bottom of the baking sheet while baking in oven. I think it ruins some atomzers.