I found the trick with mine was crafting a chamber reducer from a wine cork. Problem was I then got lots of other attys.
I recently dragged it out, cleaned it recoiled and wicked it to give to my brother as part of a kit with a dripper, nemesis cells and charger.
When I was testing it out I thought "I really should have given this a bash sooner, its pretty damned good"
Last build was 2mm airhole, reduced chamber, .7 ohm .45 kanthal micro coil and cotton wick. Simple reliable set up that just works well. I might have to get another in glass at this rate.