If you already are aware of the risks that can be associated with computer duster, scroll down past the Red "End Warnings" text.
Some warnings about canned air, and a big thanks to VaporWare for reminding me that some warnings may be in order:
Quick note about the cleaning guide from
@RalphsBlend - it’s important to remember that most canned air is made up of things you don’t really want to breathe, so while his method is probably safe, I would be wary of for example spraying the screen with it between bowls since there’s more chance you’ll end up breathing that stuff in when you’re in the same location and you’re going straight from spraying it to inhaling deeply.
To add a few warnings for the uninformed since I figure I may as well cover all the bases:
1) Canned Air does contain gasses that are known to be asphyxiants, so in low ventilation environment repeated use over a period of time can replace breathable air in a manner dangerous to your health. As such, I agree with VaporWare's assessment that you probably shouldn't be using computer duster for vape cleaning constantly. That said, I work with computers and make use of duster frequently (though not every day) and in far greater output per session than described below for computer cleaning applications to no ill effects, so the key is being safe about ventilation and not using a ton of this stuff. If you are worried, do the duster step outside and you should not have any issues.
2) Hold the can as upright as possible while discharging the gas, if you hold the can at too extreme an angle (try to avoid angling the can more than 45 degrees from straight up and down, you'll know immediately if you've done it wrong) as this will cause the liquid form of the gas in the can to come out of the straw and this can cause freezer burns if it comes in contact with your skin.
3) The can will, with sustained discharge, begin to get cold and can get so cold that it freezes the condensation that starts to form on the outside of the can, though I've never gotten the can to do that with the amount of discharged when cleaning the bowl's screen, only with sustained computer dust blasting applications. Still, it's something to keep in mind if you decide to use the duster in other applications.
4) I had forgotten about this until I did a bit of supplemental googling, but due to sufficiently widespread abuse (extremely dangerous, but it happens), computer duster does contain a bittering agent. If you find the taste to be strange after doing a clean like this you may want to give the inside of the bowl/screen a quick ISO wash. I personally have never noticed an off taste after cleaning like this but I may not have the most sensitive palate, so your mileage may vary.
End warnings.
I promised I would detail how I clean my untrimmed double weave screens in the adjustabowls without removing them from the bowl itself, so here's the technique I use.
Note: I cannot guarantee this will work for the OG bowls/screens (though I'm not convinced it's necessary given how easily they seem come out), as they may fly out and be lost forever during the steps involving the computer duster, so don't say I didn't warn you.
For this, you will want a can of computer dust remover (or computer duster) and some safety glasses (or glasses generally, within reason, small lenses may not be very useful for protection), in addition to the usual suspects (paper towels/isopropyl alcohol). For the uninitiated this is a can of compressed air with a thin long straw you insert into the nozzle to get very precise and forceful airflow. Strictly speaking any air compressor with a thin nozzle could work, canned air is just the most easily and economically available solution. And you don't need much. I pick them up by the 3 pack (somewhere between $10/$15 USD) at Frys but can be found at office supply or electronics stores generally and I have yet to go through one over a few months of cleaning this way.
What I do is I remove the post and handle from the bowl, but leave the screen in. After doing so I hold the bowl and screen up to some light to look through it to get a sense of how much light is passing through, for reference later.
Soak the entire bowl/screen in ISO for however long you think you need (this may also be a good time to soak the post, but I usually find the screen needs cleaning long before the post does). No need to agitate anything, just put it in a baggy/container and let it sit, you'll do the agitation later in a rather dramatic fashion.
While you wait find a place, item, or receptacle you don't mind a bunch of brown vape residue getting on, and/or one that is easily cleaned (such as a sink). We will use this shortly. I personally use the lid to a jar I store ISO in, which is fairly wide and can then be put on top of the jar after the inside of the lid gets covered with residue and shaken up to remove the residue from the lid, but I'm sure more elegant solutions exist.
Now that you've let it sit for a while (I let it sit around 30 minutes), pull it out and use a towel of some sort to remove the excess ISO from the outside of the bowl, but leave the inside wet, it will partially evaporate by the time you get to the next steps in all likelihood.
Next take the bowl to that item place or receptacle, put on some glasses or safety glasses if you are worried about splashback (and there may be some, be warned), and point the TOP of the bowl (the part that mates with the coil nut) at the item place or receptacle, so that you should be looking at the bottom of the bowl and the item place or receptacle through the screen.
While keeping the bowl aimed, take the computer duster and aim the straw as parallel as possible to the sides of the bowl and position the end of the straw close to the bottom of the screen (not touching though), then pull the trigger. You should see the screen clearing up quite quickly in the general area around the straw. Move the duster/straw around the screen while blowing and this should blow a bunch of vape residue at whatever you were aiming the top of the bowl at, as well as the insides of the top of the bowl.
At this point, once you are pretty sure you've cleared the screen, hold the bowl/screen up to the light again and check for spots you may have missed. If you see some missed spots, dab some ISO onto that part of the screen repeat the duster process for that particular spot. Note that if this does not seem to be cleaning the screen, you may need to soak for longer and try again.
Once you are no longer seeing missed spots when you hold it up to the light, take a paper towel and wipe out the top side walls of the bowl which have probably gotten some residue on them now. You may need a little ISO on the towel to get it really clean.
Once this is done, reassemble and let dry thoroughly before use.
I do this every week or so and find that keeps things nice and clean for the amount of work required, especially since you don't need to remove the screen.
Of course, if anyone needs clarification pictures, let me know.