I just did a dry burn on my atty because my vapor production was really low compared to what it was when I got my unit. When I got my ego-t, I was making clouds of vapor I couldn't see though and before I cleaned it the amount of vapor was poor even compared to what my old Blu made.
I live in a state where you can't go out and buy PGA at the store. The only place I can get it is on the military base, so I don't get it very often...and we kinda drank the last bottle I had.
So, instead, I used some cheap vodka I had lying around. I blew out all the excess liquid from my atty, and swished it around in a small cup of vodka to clear up some of the gunk inside. Then I put it on my battery and kept hitting the switch. After awhile I started to get wisps of smoke that smelled like a mix of all the flavors I was vaping. Soon after the smoke started to smell like plastic.
I considered stopping, but decided to really clean this atty or break it. After a couple of minutes the plastic-y smelling smoke started to thin out. I decided to stop because it was making the room smell really horrible. I threw the atty in some more vodka, swished it around. Lots of little black bits came out this time. I dried the atty off, blew out the excess vodka, popped a filled tank, took a few primer drags and then BOOM! Craploads of vapor! The first few puffs had a plastic-y taste to them, but it went away after a minute.
Do I recommend stressing out your atty like I did? No, especially if they are old. But it worked wonders for me. I'd assume that almost any kind of cleaning method has the risk of ruining an atty. I once cleaned an atty using some Beerbrite (it's like a food-grade oxyclean homebrewers use to clean equipment) thinking that if it's safe to use in my meadmaking, it would be fine with an atty. However, it fouled it up so bad that I couldn't use it.
If you feel adventurous, go for it, but make sure you have a backup so you don't paint yourself into a corner! Better to have an atty with low vapor production than one with none!