juice in protank- changing viscosity,flavor and color

[l0stm4n]

so for the past month or so, ive been vaping ecto plasma and tribute.
the protank works flawlessly however when i vape my full tank, when the juice drops to about 1mm away from where the botom metal meets the glass, the juice seems to have been spent. flavor becomes greatly diminished along with vapor production and the color changes.
i've been thinking that maybe pg/vg is much more dense than water and the way the coil is set, the vg/pg is gone first and im left with only watered down juice at the end.

anyone else encountered this or has any ideas of what,how its happening and how to stop it?

EDIT: i do shake the life out of my juices prior to filling my tank. so i dont think this is a variable.

 

[ScottP]

As I said in THIS thread, sweet flavors can caramelize when exposed to heat. I do not know about a Protank but if heat is getting to the juice this could be the problem.

 

[Killowatt]

I noticed when I just keep refilling, this happens. Every now and then I'll empty the small amount that's left, usually a little darker and thicker, and rinse it out with hot water, then dry and refill. No big deal.

 

[tj99959]

Now you know why I like a dripping atty so much more than any tank. There isn't a tank system made that doesn't do that. Some folks don't seem to notice the flavor shift all that much, and are fine with tanks. I found that I was throwing away as much juice as I was vaping.

 

[volume control]

Yup, the flavors tend to gunk up if its a real heavily flavored juice or the flavors were made with solids. I get it to that point now and then, just rinse everything out and start over. It takes a few tanks before the bottom starts to get black and thick on me

 

[ScottP]

Now you know why I like a dripping atty so much more than any tank. There isn't a tank system made that doesn't do that. Some folks don't seem to notice the flavor shift all that much, and are fine with tanks. I found that I was throwing away as much juice as I was vaping.

And I on the other hand couldn't stand having to constantly have a bottle with me to drip juice.

 

[starwatching]

Mine started doing this with my homemade RY4 Double. I decided to switch out my atomizer, and then it didn't happen for a bit. It is a sweeter vape.

 

[look30]

anyone else encountered this or has any ideas of what,how its happening and how to stop it?

Here is a good explanation i found on a different forum :
All Kudos goes to the OP!

It turns out wick, etc goes bad not because of constant heating and expanding/shrinking, but because e-liquid will caramelize with time. The flavorants used in e-liquid contain some sugar, but in a very minute amount. Some vendors even add extra sweetening to add flavor or sweetness to the flavor.

If you put sugar in a frying pan, you'll see what I mean. Don't actually do this since it's difficult to clean, but the sugar turns into a thick liquid that dries into caramel. The same happens with e-liquid.

While my answer about constant heating and expanding/shrinking holds true as wick will do this, the main culprit is the caramelization of e-liquid. This is why coils get black or brown and e-liquid in an old tankomizer will change hue to a dark orange/brown (if you use say, a Kanger T2 for a long time without changing the coil, the liquid inside gets darker).

So to summarize: wick becomes hard to use and provides little vapor with time because e-liquid when heated tends to solidify. It doesn't happen very quick, it takes a couple of weeks for it to accumulate to a level where it becomes problematic. Blowtorching wick gets rid of this, but the damage that constant heating and expanding/shrinking is irreversible and blowtorching may make it worse. This is also why dry burning wick is advised every couple of weeks because it removes the solidified e-liquid.

I only found this out when I went to clean my IGO-L and noticed it was caked in solid e-liquid. My GG wick has finally bit the dust after 2~ months (and four dry burns later); it was a tar black and hard like a rock when I took the wick out.

And to summarize a bit more:

E-liquid with more VG in it will make a wick last less time
E-liquid with a very sweet flavor will make a wick last less time

I chnage my wick and coil every 4-5 days because I vape mostly VG and I like sweet juices with caramel and sweetener.

 

[crxess]

Does all this in All delivery systems. More noticeable in BCC tanks where the juice is collecting/thickening around the warm bottom coil. The larger the system or the less it is used the more some changes will be noticed.

 

[tj99959]

And I on the other hand couldn't stand having to constantly have a bottle with me to drip juice.

Reo's work so nice

 

[stormwench]

I don't have a protank, so I can't speak for that product specific, but I have always noticed, well best called a 'watered down taste' to my e-juice once it gets to about that level. I also have noticed that I get condensation on the plastic of whatever tank I am using. I am not sure if that condensation is water from the e-juice or from the atmosphere but it makes sense either way it could 'water down' the little juice that is left since there can be a lot of condensation to mix with what little juice is left. I have taken a tank and shook or rolled the remaining e-juice over the condensation and increased the amount of measurable e-juice enough to be noticed like from .2ml to almost the .25ml tick. thats a lot f water delusion i my book and I think more then enough to make a noticeable flavor change.

Before I refill, if its not coming out for rotation into cleaning, I shake or tap that last little bit out of the tank before refilling because I can't get the idea that the condensation is not watering down the juice as I refill or, if the shape/design/size allows me to run a q-tip or edge of a paper towel/tissue along the wall of the tank as a quick dry out.

As for being able to avoid this condensation I never have been able to and not sure that you can since the whole device is meant to produce a water vapor and water vapor is just water droplets that atomized in the air and are heavier so they easily fall out on a cooler service, air temp etc (in large amounts it rains! but not sure anyone had produced enough vapor for that).