Just use this shit. https://www.amazon.com/gp/product/B01GF411G6/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

Mine's lasted for years now. The trick is to have a heavy skillet to put on top of it after youve taken off the coals. I forget why this is good for it but its something about how it cools down that causes the burner to eventually fail. I personally use a heavy ass tortilla skillet that weighs like 20lbs.