Originally Posted by RetiredArmyCWO
I am curious how one could get inside the gas line. That should be a closed system, otherwise it would leak. If you had disconnected a hose, I could see where that may occur, but I am certainly confused as to how that could happen otherwise.
The spiders get in and spin their webs in the air intake/mixer portion just before the burner.
Yep, I've had this problem before also. I've used a good strong vac to get 'em out and or a coathanger. Other bugs to worry about are wasps and mud dobbers. You can buy tight mesh screens at camping world to cover the openings in the heater and water heater, the 2 main places where bugs can ruin your day with their nests.