I won’t guarantee this. But I’m pretty sure the burner tubes and caps unscrew. I thought the same thing on a 220j after awhile I said the heck with grabbed a pair of pump pliers and twisted. Low and behold It unscrewed. I’m betting you got a bad screen. Just my 2p. Edit: the new burner assembly on OCP have brass tubes which makes me even more sure they’re screwed in.