This sounds like dried residue in the feed to the pilot light, or inside it. If you're pretty mechanically minded, you can maybe disassemble it enough to blow out the feed lines and pilot assembly with air pressure. OtherwiseYou can lightly tap on sturdier places to try to kind of break the particles loose, and wait for the propant to blow them out. I don't think any condensation could have gotten in it, but if that's the case, it will have to be evacuated. If you can get at the jets with a toothbrush or small brush, you might try to break up any residue in the tip of the jet. Any residual obstruction can cause an intermittent gas feed, so try to clean the valves and feeds as good as you can with a toothbrush and alcohol. Good luck, and I hope this helps.