I've gotten weeks out of my AGA-T & #500 SS mesh without even having to clean. I've been using the same wick for months, and have changed the coil 3~ times in that period.
I vape unflavored though, so it doesn't dirty a coil anywhere as fast as flavored & especially NETs.
When I was vaping NETs it was about every other tank I'd pull the wick, dry burn all the gunk off.