Hi guys, I started with the penstyles over a year ago.  Still use one every day.  801, RN4072 and 302.  
I've never dry burned... only time I have lost an atty is due to a wonky 5v passthrough (7 deaths in an hour!!) and a battery 
mod that had a bad adapter *mad*  I've got some attys that are at least 8 or 9 months old.  Still 
vape just fine.
If I have a tight draw I first checked (when I used to use polyfill in carts) to see if fibers migrated under the bridge in the pot and used an interdental brush to get out the fibers (now I use AquaClear foam).  
If gunky from bad 
juice, boil in the microwave with about 2 inches of water over the top of the attys (yeah, you can put water covered metal in a microwave!) for 3 min. and let sit to cool  Then rinse or soak to displace water with PGA, prime up with about 6 drops or so of liquid and vapes like new.  I use EverClear (PGA) to clean them about once a month or so.
Less is more when cleaning penstyle attys I think.