summit snap-jet igniter

Hi All. Really need some help My snap-jet sparks. Initially a Burst of flame comes out of the tube. However it doesn’t stay lit I can hear the propane when the flame in the tube goes out What do I need to do? I’ve gotten ash out of the tube with a q tip. No difference All suggestions welcome...

I picked up a recent-ish Summit s-670 on Craigslist. Very minimal rust, and it cleaned up great. Of the six burners, three of them ignite perfectly with the snap jet igniters. The other three feel like everything is fine, but they won’t light. I can feel and hear a definite click at the point...