I spent my spare minutes over the last couple days crocheting a pot holder for the door of the rocket cooktop, which we have discovered gets quite hot. I used some gorgeous naturally-dyed yarn that Judith Browning very kindly sent to Wheaton Labs, which Paul & Jocelyn were sweet enough to allow me to use. Unfortunately, the door got a lot hotter than expected, and charred the potholder almost instantaneously! Luckily, the charring was on the wrong side, so the right side (the “front”) still looks good, and can be used for actual pot handles. I may need welding gloves for the door!
Find some wool! Judith might have sent some, too? It works much better against heat than cotton does, especially if you felt it. Crochet it big (1.5 to 2 times as big as you need) and then felt it down by scrubbing it in hot water (or throw it in the washing machine and churn for 10-15 minutes until it looks solid like felt)
Nicole, several of the casserole dish lids have exploded. Hopefully mine will not! But apparently they get quite hot. Fred says the stovetop gets to one thousand degrees above the “ram’s horns” part of the flame (the bit at the top that’s sort of fountain shaped). It’s pretty crazy.
Felting it will help keep your hands safe. The holes in knitting/crochet seem to let the heat through far more easily than the solid (and thick!) surface of something felted. It'll probably make a more durable pot holder when felted, too.
I'm thinking that felting it won't help much in terms of keeping it from singeing. If the casserole dish is that hot, it'll singe the wool.