I have a Regency H2100 word burning fireplace insert. It's two years old. The handle on the air control stick is coming off the rod. It's one of those spiral stainless steel knobs, so you don't burn your hand when opening or closing the air. It gets used quite often. Every time I put fresh wood in, I open it up to get the fire going. Once it's flaming I push the stick in to get a longer burn time. It seems like I could put tape on the end of the rod to make it fit tighter, but I would need heat resistant tape. Do they make anything like that, or if anyone has any other ideas. When you push it in, it slides on the rod. When pulling it out the knob comes off. It doesn't have any threads.