Should the color of the Cannabis determine when to remove from a Digitial Vaporizer

[vapefiend]

Your vape bowl is plexiglas? And it's "top of the line"? :wtf:

You shouldn't be getting black remains at 386 F. If you are, then your display isn't accurate. Your bowl is done, at a particular temp, when you get no more visible vapor (best seen under good, direct lighting). The burnt popcorn taste is also a sign.