At that time, I was still using tepid water and the 'regular' drying cycle - which is geared for 'wash and wear' and removed them from the dryer when they were 'just' dry.
After I 'cooked' some polyester dress pants many years ago, I avoid using high heat in the dryer.
I also try to use fabric 'au naturel' - because that's how I think the fabric will be after the recipient/final user of the item has washed the item.