About 2 or 3 weeks into vaping and being smoke free I had a similar issue with my taste buds, but rather than everything tasting burnt....everything just tasted like wax to me. I kept trying my different devices and switching flavors but couldnt taste much of anything except the waxy taste in my mouth. I scrubbed my teeth like 5 times a day over the next few days trying to get that darn taste out. What I did to get through it was probably a different approach than most folks would recommend here, I grabbed a fresh battery and fresh carto and went to the bar for some drinks. A couple hours later I didn't notice the horrible taste ....at least till morning. The whole thing was done in a couple days and I can only imagine that it was my taste buds acting up while I was quitting cigarettes.