hello: if you can use compressed air if you have access to the pilot through the sight glass, you may not need to disassemble the pilot's air intake at the base of the pilot, it is a perforation just above the injector injects air into the entire area then try the operation any doubt comments greetings
hello: if it is a little it does nothing it can be intermittent the yellow tips can also produce impurities in the gas and the same circulation of the device. If you see that I improve when injecting air the base looks blue and has the normal size is perfect leave it like this, when it turns very yellow the flame takes a lot of height loses calorific power and by not heating the thermos well the heater would turn off any doubt comments greetings