I've switched back to the E0 heater output and everything seems fine. Even though all the connections seemed good it must have just been a loose connection or something. If it comes back I'll let you guys know but for now consider this closed.
Sorry I haven't responded in a long time. Other projects have been keeping me busy. The burn-in appears to be coming back. It isn't as bad as when I first noticed it but it is worse than right after I had the power off for a day.
