A couple of years ago, I was traveling with my F-53 Chassis, class A Motor Home when I notice the smell of gear oil. Checked the rear axle and the inside of both inner rear rims were covered in gear ...
I just Tye Rapped a chunk of nylon stocking over the rubber tubing on the propane regulator on my Generator when I found Mud Dobbers building a nest for their young in my tube. Has been there for over 10 years now with no more problems. I have found them building nests in my Trailer plugs and any other round protected area they can find including the small channels in the awning arms. They are a pain in the rear and in some cases can cost us big bucks.