Does E Liquid Expire? How to Tell and What to Do Now that's something to wrap your lips around. Vaping regularly can cause dry mouth, which can give you bad breath and damage the mouth, throat, teeth and gums. Some of Does Vape Juice Expire? How Long Does E Juice Last? Vapor Space So my vape was burning the back of my throat. I changed my coil and primed it for a long time. It still feels like it's burning. Any ideas why? : r Vaping