Critters.....yes we have had ants so bad we had to remove all food stuffs and spray.....fell out of the trees overhead and when we got on the road they all blew off...what a mess....
our hook - ups go thru a big hole in our utilities compartment....the only way to keep critters out is a wood plug the same size as the opening with a small slot cut in it to just accommodate the tv, water, power .......and push it in ....and spray the heck out of the cords and surrounding area.
Coons are so smart they can even figure out how to open a frig.....I shoot every one I see....we are hardly a match for them...LOL..
My Fleetwood is very well sealed....but still no match for critters....LOL