The best way to clean the burner is to polish the burner inside the burner slot using the burner cleaning strips and a liquid metal polish (like “Brasso”). Then clean the outside of the burner slot with a clean rag. Then sonicate for a few minutes in a detergent solution, rinse and dry. Ensure the burner is dry before refitting and igniting the flame. To avoid damaging the bead when replacing, ensure the adjusting screw is turned full clockwise. Then fit the bead and tighten the locking screw.