I've used 190 proof grain alcohol before, and gotten them somewhat "clean", but something like a heavy tobacco or methol flavor will pretty much linger forever in the background regardless. As someone else stated also, there isn't any cure for burnt.
When I first got into vaping, as a means to quit smoking, I never imagined building my own coils, but now I really don't use anything that doesn't require building and wicking.
While building isn't for everybody, I will say that it can definitely be addicting once you start. I find it very therapeutic myself... not to mention a good bit cheaper than buying disposables.