Mice!
The holes in the frame where the sewer handles protrude are easy access for mice! Our 318's heater is just above and allows them access to the interior. I am so glad I found them before they spent the winter in our new TT. I temporarily stuffed steel wool in the holes. It might be worth checking your TT just to be safe!
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2012 Lacrosse 318BHS
2010 F-150 Max Tow
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