Just put it in the oven at between 125
and 130F for a couple of hours.
I'd recommend using the oven only in a passive mode.
The radiant heat of a live element probably exceeds
125 by a lot. I melted some plastic once in an oven set
very low. Next time I do this I'll preheat the oven, shut it
off, wait a few minutes and then use the residual heat.
John A.