Have any of you had problems re-firing the flame on your burner if you had to switch propane tanks in mid-boil? Last weekend my first tank run dry about thirty minutes into a 90 minute boil and it didn't want to re-fire (it was burning inside the chamber leading to the ring, but wouldn't fire in the ring for some reason - although it eventually did after a few tries). I have the Banjo Burner (KA 4B set up, IIRC), permanently mounted to my brew stand. It runs the boil with the air vent dial open pretty wide. Maybe I should get a pair of gloves and close it next time? Then just readjust after lighting?