For the single coil evod/kanger atty heads this is the process that I use.
Atomizer Cleaning
Soak in 91% Isopropyl alcohol or everclear over night or until I get 5-6 to clean.
Rinse throughly with warm tap water forcing water into the wick area.
Towel dry and blow out any water.
Mount the head on a tank base.
Remove the gasket and stem.
Remove the flavor wick(s).
Mount the tank base with the atomizer head on your PV.
Dry burn 6 watts, 5 seconds on/off. Repeat until coils are all turning red and wick is clean.
Blow the burned off crud away.
Hold the flavor wick with tweezer while burning them with a lighter or torch until wick is clean.
-Place the flavor wick back on top of the coil.
Or
-Replace the flavor wick with the material of your choice.
Reinstall the stem and gasket.
https://www.youtube.com/watch?v=tDRlInNt05Y
if these instructions are unclear to you the above video may help.