Tried numerous methods to try and get more from my coils (nautilus), settled on the following.
1. Rinse with warm water and inspect just how far gone they are, tossing them only if things have gotten really bad and/or deformed. (Tossing or set aside to rebuild)
2. If things just look used but coil and wicks are still physically in good shape (use strong flashlight to really see) then i let them soak in vodka bath which is in ultra sonic cleaner..30 min or so.
3. Run ultrasonic cleaner for a few minutes.
4. Readjust their position in cleaner by shaking them around a bit in the basket that holds them.
5. Soak a bit longer..30 min or so.
6. Run cleaner again for couple minutes.
7. Pull out, rinse under lightly running hot tap water.
8. Set in front of small fan until dry.
Usually do this method in batches to make it worth the time, then again other times i've gotten lazy and the steps get spread out over the course of a day or two and results dont change to much.
Never dryburn. Make sure completley dry and inspected (including check on ohm meter) before use.
Test them by just priming wick and taking a few puffs.
Flavor is very important to me, life is to short to vape "ok" juice, so if flavor is to far off they go into a rebuild pile.
May seem like alot of work but it's really not, just some waiting here and there, maybe use of tweezers or little flosser brushes every now and then.
Reward is saving cash for more juice and close to new coil. Have some coils going on a few months of heavy use. I vape 10ml daily avg, dripping included.
Hope that helps