How about a couple features on the tower style burners - 1. A door that can be opened and closed when you switch off the fan to prevent suspended debris from falling into the burner. 2. Air jet cleanout - How about air plumbed up to the burner that can be hooked to the exterior of the dryer with a valve. That way a person can blow off the burner without entering the dryer. Have metal plumbing with a quick connect to an air hose with the tips directed at the burner to blow off debris.