How do you not taste that burn? 
My stomach turns around when my cotton is even the slightest bit singed. I can’t say this ever happened to me.
Usually I don’t see the cotton in the middle though, I always change coils together with the wick. Ever so often I pluck it out just to see how scorched it is because I get a fairly strong burnt taste and it’s only ever slightly darker.
Just the wife eh? Lol
I’m thinking it’s part of my learning curve with my recent foray into Squonking! Maybe not keeping the wick saturated, had a couple minor dry hits trying to get my Squonk just right! Guess next time i get a single dry hit I will have to rewick it right then! Was just shocked to see the cotton gone!
Yeah, just hers. 
I’m a NET vaper, so changing the wick in 2 or so atomizers on a daily basis is just part of life for me. Changing wicks and morning coffee go hand in hand. 
I am not familiar with NET vaping, will have to do some more reading! I have gotten my wicking down pretty well lately so changing the wick and or coils is not that big a deal. Will be rewicking more often anyway!
This is something i have experienced quite a bit, but most often when using sweeteners.
Topic here.
I can see in that topic that i am not the only one pointing at the sweetener.
Yeah, it has happened for me once. I was doing some test mix tasting and was trying to vape the wicks dry in TC mode, I apparently overdid it and got a dry hit from hell 
After this the RDA didn’t really work properly and when I checked the wicks, the whole centre was simply gone, probably burned away.
But simply disappearing without getting a nasty dry hit first? No that has happened to me, and I didn’t even know that it could happen.
Yep if you have not yet read this (I mean watched this video… thx to @atssec97~!) in the above mentioned Topic (Thx @Chrispdx!) maybe you need to pack more wick in there. Wick HARD!
Honestly I’ve never experienced this. But this is why God has gifted us with Temp Control. With a good understanding of how heat affects the resistance of your coil material, and the ability to control it you should almost never experience dry hits. And Evolv’s Replay technology takes it even a step further.
On my squonker after vaping for a couple of days citrus prominent mixes. Cotton just broke in the middle, but I didn’t got a dry hit. Only reason I noticed it was, all the sudden I got immense spit back.
It didn’t disappear. I do use Scottish roll but contact coils in my rda, since the deck isn’t big enough for spaced. Never had that issue with other juices, blaming it on the lemon cake 
How much sucralose is in that lemon cake?
Yet another reason to space coils
Never had anything like that happen to me (yet)
based on (inw)lemon cake (sds - if we can trust that)
Vanilin
Orange Oil
Fureneol
Citral
Hexanoic acid
It’s sft, didn’t add other flavorings or any kind of sweeteners.
I had that happen once in an alien coil when the cotton was too tight inside. I started feeling a very slightly burnt flavor, and when i went to rewick, the cotton was split in two
When I read that thread i was assuming we were pulling the cotton apart trying to work it through the coils not by burning it up! I thought i had learned some from that thread but perhaps I missed something!
Interesting. I know they gunk up the coils and would make sense that would affect the cotton as well!
Sure enough! haha. Your probably right though. Using the squonk mod and vaping until you get right to the point you can tell your starving the coils of juice but not getting a dry hit repeatedly may have contributed, but no nasty bad dry hits!
I am saving up!!! I need a multi cell temp control squonk mod with replay!!! I want to try that Deep water Ti build I read about!
If you can pull it through the coil it’s not too tight! Wick Hard!!! Check out the thread mentioned above and look at video!
What you describe is what happen though, so is there a correlation? May be one of those subjective topics!
Same as above with the disappearing cotton. With contact coils and a sucralose juice I can roast out the coil cotton in about 8ml, which is just one tankful on my RDTA, which is pathetic. And it can also happen in temp control. TC’s great but it isn’t anything more than a hedge against it burning out sooner, as far as contact coils and sucralose juices go. But with non-sucralose juices (including the happy Stevia stone) and spaced coils, I’ve never seen it, neither in TC or power.
As for wicking, I have tried the Wick Hard deal plenty in the past. I have not found it superior; actually, a slightly looser pack nets me much better results. As always, with just about everything, YMMV.
+1 on this for me. slightly loose not too packed.
i had the experience of the wick splitting in the middle. in my experience there’s another reason beside the sweeteners - check your coil dimensions … if your coil is relatively long compared to diameter (like a long narrow pipe), the wick will “starve” in the middle - that’s where the heat concentration is, and it will deteriorate and burn faster in that place.
to fix, if you can, either lose a wrap or 2 from the coil (so it becomes shorter and more proprtional to ID), or use a slightly wider ID - if you’re on 2.5, use 2.7 or 3.0mm - and so on. this also happens more with SS coils where the heat ramps up faster than the cotton can wick and juice flows - all the way to the center wick - especially if you chain vape.
hope this helps