Personally haven't had a problem with burnt taste
through a ProTank with 100PG, 70/30, 60/40, 50/50 or 100VG. Could be the atty head batch you got, but some people pull the center post off of the atty head and remove a wick or two (not the one that's actually wrapped in the coil, but the ones sitting directly on top of it). Never had to pull a wick on any of my atty heads for any of my
tanks, maybe I just got real lucky (or my juices aren't the PG/VG blend that's advertised? XD) It is going to be different person to person, so maybe that's all it is. But whatever works for you, keep on rocking it!