Why am I getting uneven heat on my grill? The biggest cause of uneven heat would be an uneven flame pattern on the burner tubes. To correct this, simply clean your burner tubes with the help of our blog here! Related articles My grill is not getting very hot. What should I do? How do I clean my burner tubes? My igniter is not working. What should I do? My cooking grates are starting to rust. Do they need to be replaced? How do I perform additional leak checks on my Genesis II gas grill?