Hi and a couple of questions

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satmour

Full Member
Aug 24, 2014
7
1
United Kingdom
First of all, as this is my first post, hello to everyone!

I started vaping around two months ago, and I've been learning fast, but I still find myself encountering problem after problem, which is quite frustrating.

My current setup is a a JAC Vapour 510 VV, which is basically a VV eGO style battery with a JAC branded Kanger EVOD2 tank on top. I'm currently using 100% VG juices from purevape.co.uk as I found PG juices to irritate my throat and make me very tight chested. I'm currently using only a 1.5 ohm head, so I'm vaping fairly low voltage (3.8v or so).

My latest issue is the juice going a very dark brown in the tank, even though it starts off a very pale yellow colour in the bottle. Everything was tasting and working fine (perhaps the best it has done for a while), but the juice in the tank was so dark that I was concerned it might not be doing me any good. I poured out a couple of drops from the tank onto some paper towel, and it even had some sediment in it. I pulled the head apart and noticed a lot of black and gungy deposits all over the coil and the wicks. I did a bit of research, and I've read a few people saying it is quite normal for this to happen and for it to make the juice go very dark, and not to worry unless it tastes bad or doesn't perform well. I really have three questions about this:

1) Is it really not a problem to be vaping from a tank that's so full of old half-vaped juice deposits? I'm no expert at all, but I would have thought that there's been some chemical changes in those dark deposits on the atomiser that might mean it's not too healthy to inhale. Any thoughts?

2) I also tried cleaning the head by removing the pole piece and plastic grommet, soaking it in just-boiled water for a while, drying it, dry burning it/blowing it, washing it off again, and finally drying it again. It looked much better, and the coil looked almost new. However, it now vapes worse than ever, and the deposits are coming back, literally after just a few hits. I cleaned out the tank and put some fresh juice in, so it should be much better. I also dripped a couple of drops onto the dry wicks before re-assembling just to get things going.

3) Is there anything I can do to avoid/minimise the build up of such a large amount of dark gunky deposits? I read somewhere that if the wattage is too low, then the juice doesn't atomise properly and can leave much more half-vapourised juice on the coil. Is this true? Is there anything else I can do?

Thanks in advance.
 
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Baditude

ECF Guru
ECF Veteran
Apr 8, 2012
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Ridgeway, Ohio
What you are seeing is the "carmalization" of the sugars in the e-liquid. The high heat of the coils causes the sugars to carmalize. This is the sediment you saw in the liquid in the tank. These particles are not vaporized, so they accumulate in the tank.

Not much you can do for prevention. Its a product of the particular flavor/e-liquid that you are using. I'm not sure that its harmful to leave it in the tank when you go to refill your tank, but if you find it not particularly inviting, dump the remainder of the juice out each time you refill your tank.
 

satmour

Full Member
Aug 24, 2014
7
1
United Kingdom
What you are seeing is the "carmalization" of the sugars in the e-liquid. The high heat of the coils causes the sugars to carmalize. This is the sediment you saw in the liquid in the tank. These particles are not vaporized, so they accumulate in the tank.

Not much you can do for prevention. Its a product of the particular flavor/e-liquid that you are using. I'm not sure that its harmful to leave it in the tank when you go to refill your tank, but if you find it not particularly inviting, dump the remainder of the juice out each time you refill your tank.

Thanks Baditude. I wasn't aware that actual sugars were used in e-liquid flavouring. I'd assumed that it would mostly be artificial sweeteners rather than actual sugar?
 

LisaR

Ultra Member
ECF Veteran
Oct 6, 2012
1,499
6,649
Martinez, CA
How often are you changing your coil? I find that when my juice gets dark quickly, it's past time to change it. Many people will recommend that you learn to dry burn and re-wick your old coils, but some of us (myself included) just put in a new one whenever it starts to get gunky. I've found that although I can clean them and dry burn and rewick them, it's just never quite as good as a brand new coil. This will vary on the type of juice you use, the power you vape at, and other considerations, but I go through a coil about every 5 days or so.
 

satmour

Full Member
Aug 24, 2014
7
1
United Kingdom
How often are you changing your coil? I find that when my juice gets dark quickly, it's past time to change it. Many people will recommend that you learn to dry burn and re-wick your old coils, but some of us (myself included) just put in a new one whenever it starts to get gunky. I've found that although I can clean them and dry burn and rewick them, it's just never quite as good as a brand new coil. This will vary on the type of juice you use, the power you vape at, and other considerations, but I go through a coil about every 5 days or so.

For a while I was having to change the coil after every 1-2 refills, even though I would expect 10 or so refills before needing to change (it's an EVOD2 tank). I'e turned the voltage down a bit, which seems to be helping this though. I have tried dry burning, but as you say, it never seems to be as good as a fresh coil. Frustrating how high maintenance this e-cig business is for me so far!
 
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