Well thanks for teaching me something new.
Now that I hear this explained some more, I know what you guys are talking about. This really is a chemical reaction. The only banana I ever vaped was a banana cream pie, and I was either dripping, or using a SmokTech cartomizer. It was good, and I still have some, I just never got around to trying it in one of my Vision Extremes, I mostly used the Stardusts when I had a small bottle of something I didn't buy often, and the Vision Extreme when I had a large bottle of something I bought frequently. One of these days I am going to have to try a banana e-liquid. Is yours a tobacco-banana, or just a banana only e-liquid? For some reason, I just have a difficult time vaping tobacco flavors anymore. I have a tobacco vanilla I like, but it's sitting in the bottle getting old, I need to vape it soon. I'll go ahead and try a liquid from Aroma, and see how that works out with my carts.
I recently tried five E1 Revive version 2s, (another clearomizer with replaceable parts) and only 1 of the 5 is making vapor, the rest are making dry smoke that burns my nose, eyes, and throat. The tube is very poorlly made, so I don't recommend it for juices that are known to leech plastics. I know what you are talking about having a sore throat from a chemical reaction. My issue is a wicking issue I think, the new juices I am using are 90% - 100% VG, very thick, thicker than most VG liquids. They are the Red Tail Vapor Line from Aroma Ejuice, they have an Aroma line that is PG based, but I like the flavors in the Red Tail Vapor line better. The thing I like about Aroma Ejuice liquids I buy, is they contain minor Whole Tobacco Alkaloids, and they satisfy my cravings for analogue cigarettes, and vaping this juice is just as satisfying as smoking a real cigarette, 100%, I don't even want to smoke a cigarette anymore after trying these WTA minor alkaloid juices.
You should look into it if you still crave analogues. The science behind it is real, and the discussions at Ecig Forum have been very informative. I will not go back to vaping non WTA juices after using them for a few days. I just feel like I smoked a real cigarette. Some people are addicted to more than just nicotine, tobacco has minor alkaloids that are very addictive, and perform several functions in the psychoactive part of the human brain, including the addictive part of the brain where reward and nicotine are processed. A guy named Dvap who posted a lot about this process, perfected the science and was much of the inspiration behind 2 vendors who sell this product now, but I can't recommend the other vendor, but that is something you would have to decide for yourself.
WTA isn't for everybody. Nobody really knows the risks of Cancer involved, it still doesn't use combustion so you still don't have Carbon Monoxide and 4,000 chemicals, but there are chemicals in minor alkaloids, tobacco-specific nitrosamines (TSNAs) that have been suggested to have possible links to Cancer, but not 100% verifiable. So this science is still rather new, but getting rid of the analogue cravings, the testimonials are indisputable on that in my opinion.
I did order some stardust from altsmokes, but when I got them, 6 out of 10 had those spider cracks at the bottom, so I don't get it from them anylonger. Even though I had this problem with the mouth piece, I like getting them from litecigusa. I ordered 10 from them, and not one was cracked.
Anyway, didn't mean to hijack your thread.
I hope you get your vaping situation fixed soon. I know the version 2 of the Stardusts fixed the juice leeching of the tank, you have to buy from vendors who specifically make this claim. But as for the mouthpiece, I have never heard the claim made that it was impervious to this chemical leeching, so I can't be any help on that.
Live long and Vape.