It's covering the gas outlets of the burner; the gas doesn't ignite till it's a little way beyond the burner, and most of the heat would rise (some would radiat

It's covering the gas outlets of the burner; the gas doesn't ignite till it's a little way beyond the burner, and most of the heat would rise (some would radiate down, and some radiant heat would reflect back off the plate/grill). So it _might_ not get too there, and this might work. Though I think a strip of aluminium wrapped around the spot would probably be easier.