The difference between cheap and expensive liquid...

[mammoth]

In my shared house 3 of us smoke ecigs. We all use 510 batteries with bogetech cartomisers. The other day my housemate came downstairs claiming he'd found a great way to clean the cartomisers and showed me as he pushed a hair clip down and scraped a horrible amount of black tarry looking stuff from the coil and surroundings. All of this stuff was hidden from view, so it made me want to try cleaning one of my own too.
Now the thing is he buys liquid from China and other UK stores that have their own liquid produced abroad, whereas I buy UK made liquid. What surprised me was that when I took a really old carto and tried to clean it in the same way he did, nothing came out. Clean as a whistle. We've since re-tried this experiment on cartomisers with different liquids and almost all the cheaper liquids produce black gunk whereas my UK made stuff does not.

My theory is that cheaper liquid uses sugar as a sweetener which does not vaporise, but instead burns and turns black, whereas the pricier stuff uses glycerin that vaporises leaving no residue. Anyone have any evidence of this, or a different answer?

 

[donnah]

It something interesting to ponder on. I like to vape plain PG with nic. I wonder how long a carto would last with just plain unflavored nic in pg.

 

[mammoth]

yeah, that would be the ultimate test i guess. i'm a sucker for the fancy flavours though unfortunately

 

[nanovapr]

Darker liquids leave more physical residue. I use mostly Boge cartos, and sometimes the draw gets tight. I straighten a paper clip and gently push through the center air channel. Sometimes there's a little goo, and that helps. I straighten by hand, then squeeze with pliers, all around to get it very straight, don't want to snag those little coils.

 

[mammoth]

but what is the goo. i've never had any black residue leftover, even with the very darkest of liquids made in the UK.

 

[melloyello]

the amount of "black goo" you can scrape off the middle breathing hole also depends on how often you flood your cartomizer. if you never overfill your carto, you will have almost nothing to scrape off. if you repeatedly flood the carto, it gets flooded and burned, it "carmelizes" along the opening walls. as mentioned, the sugar content and darkness of the liquid also plays a big role. do you use the same volt pv?

not saying your idea doesnt have any merit but i think it has to do more with the user