#4 I'm still in allergydom. Sneeze-o-rama. a)Toothbrush, dish soap, scrub, rinse, repeat, repeat... repeat. Those things are filthy. Watch out for metal shavings. Remove the post screws and airflow control screw before washing, they tend to rust quickly if soaked in water, depending on which version you bought. They shouldn't be nearly as dirty compared to the rest of the parts.
b)Go with whatever has been working. It has been working, yes? I find experimenting with
coils to be a waste of time without a video for reference. I've tried a dragon coil straight from the air hole and sideways, double dragons (both directions), diamond(?)... micro-
coils still treat me the best. Easy tip: don't skimp on the wick & tuck some under the coil if possible. Your Mojo May
vape better.
Post-post edit-edit:
It's basically just wider, spreading the heat out over more area than round wire. 3 wraps would cover 2-5 times the wick, depending on what gauge/resistance you have. It doesn't work on microcoils, making cotton ball wick or any re-wicking a poor choice for ribbon wire. It's usually good on SS and silica, especially in gennies. Standard JMO, AFAIK,

, blah, blah.
For my next trick, I'm going to attempt quadruple twisted 32 gauge. I don't know what else to do with it, and I probably have 75 feet left.