I remember when these topic started. Jumped right into pcing. Bought a cheap Walmart oven, used the same method. Set my timer for 25 mins (know or knew the ovens habits) set to my phone, check with 8mins left 1/4 of them where melted (just nubs) and 4 or 5 where starting to do that. Maybe 1000s of boolets just in these one oven alone. Never had that happen.
Plus side the coating bonded well