The screw that hold my oven door handle on keeps loosening up.

A little loctite holds it fine until I go to 450F or 550F for an hour
or 2-- then it pulls loose. The threads on the plastic are stripped.

I've considered just putting the next bigger screw in it's place, but
if a little goo can cure it, I'd rather go with the goo than try to
locate the perfect, flat headed screw. [the screws are some sort of
low profile, washer headed, coarse threaded critters]

Thanks-
Jim