I haven't done the dry burn even (guess I should research that on why). .........
The only thing I'd like to see is a better way to tell when it's full as I don't always wait until it's tasting "dry," but I doubt that will ever happen.
Well, the dry burning burns off the build up of "unvaporized" particles off the heating element. If you pull the silicone cap (the one with the holes for filling) off and look down in you will see black on the element.
Steps to do a dry burn:
1) pop of white cap and remove silicone cap (one with filling holes) [see attatched image].
2) Take the carto and run water through it.
3) Shake or spin the carto to get most the water out
4) dry threads and make sure you did get most the water out
5) Attatch carto to manual battery or usb-passthrough
6) press and hold button for ten seconds,
7) repeat, repeat, repeat,
8) take needle (while red hot) and poke the gunk on heating element (it will fall away)
9) press and hold button for ten seconds
10) Unscrew, blow though battery size to fling ash out (wick will now be white)
11) Take note of two notches and incert silicone cap back in (this is hard the first few times)
White cap in and you are finished.... .
As to telling when they are full, I use a digital gold GRAM scale. 5.0 - 5.2 grams is full (carto by itself, no condoms). Hope that helps.