Love the steam method idea - going to try that next - enquiring minds need to know!
IIRC from chemistry classes. Alcohol does not dissolve sugars, caramelized or not. Hot water can to some degree but since im a noob to cartos, i can not say if it will or will not help. IMO once you have caramelized sugars in a carto fiber material, its mostly there for good. Its not like a cotton shirt you can throw in a washing machine and agitate it with soaps/detergents.
I think if you just didn't like a juice and want to flush it out of a carto, then hot water followed up with some PGA (Everclear) is the best chance you will get reasonable results. PGA will speed up the drying process also but vodka would be my next choice IF i wanted to clean one. The higher the proof the better IMO. Some flavors though will likely always linger and if the coil has accumulated some carbon, then you are probably fighting a losing battle unless you absolutely need one to get by.
I get plain unpunched XL 1.7ohm single coil cartos for $1.39 at Elite VaporWorks. They have an online store but they are not far from me. Frankly i don't mind paying a tiny bit more and support a local business when the customer service is good. I just stocked up on them since the price was as good or better than i found online. At that price, i have to wonder if cleaning them is worth the effort unless it is out of necessity or you just enjoy tinkering.
Has anyone tried isopropyl alcohol or acetone? Both will evaporate quickly and leave no residual chemicals.
This just came to me and it might work. I vape unflavored eliquid off and on. It's only PG and VG with nicotine. It never clogs a coil at all. I've used the same cartomizer for several months a couple times. The only reason they finally died was because I added flavored juice. It might work in reverse if you add unflavored eliquid to your waning cart. Unflavored has a little natural sweetness and is the closest I have come to a real cig since cigs don't have much flavor. If I give it a try in the next couple days will report back on the results. After all its the coil you're trying to clean and what better way than firing it up with something that wont add any additional clogging agents.
I don't see why. As long as the fill material doesn't react with acetone (some synthetic materials do) it is an effective solvent and evaporates clean. Your body natural produces acetone, fyi. The only consideration in my mind is whether the fill material is solvent in acetone. Not all plastics are. Polyester fill would melt, but I don't know what carto fill is made of.
Isopropyl seems more suited to the task and is readily available in 91% at your local pharmacy. Again, no health hazards involved provided that you allow it to evaporate fully.
I wonder if hydrogen peroxide would be effective in combination of any of the methods? Ive got one that is still vaping but its getting tight. Ive been pretty careful not to let it get too dry and burn. I might try it just to see if it works good enough to make it worth the effort.
I'm surprised this one hasn't already been tried...the oxidation from it would probably help release PG and VG from the fibers (think Oxyclean, same concept and chemical almost). I would try it by itself at first and see how well it does. If you mix it with something else, I'd suggest vinegar. It is one of the most effective cleaners/deodorizers/disinfectants known to man. The reaction between the two would be similar to that of vinegar and baking soda, which is used to treat carpet stains.
That gunk is probably a polycarbonate of some sort or another caused by the carbon/oxygen in the PG, VG and flavors with sweet flavors being more prone to creating that gunk.
Im not saying this is THE cleansing agent but a non toxic version might be chemically superior to just water and PGA flushing. I AM NOT SUGGESTING ANYONE USE REAL OXYCLEAN.