How often do you clean you tanks?

[EBates]

A new KF gets a total tear down and wash with soap water and an old toothbrush. After 5-6 tanks rinse in warm water, remove the old cotton wick, blow out and towel dry.
Dry burn the old coil 'til it's clean, install a new cotton wick, tweak as required, juice it up, and vape away.

 

[Kloudz]

I clean my tanks about once a month, that's when I usually rewick it also