I picked up my 22FB today from storage. I am always diligent in checking for any holes, and sealing up all the openings - fridge, water heater, furnace etc with plastic prior to storing, and putting dryer sheets in the trailer.
I have been doing this for 22 years, and have never had mice until this year.
I knew they had to get in somewhere. I have had this 22FB for five years so I guess up to now I've been lucky.
I checked all underneath and all around and couldn't see any holes.
The mouse poop was mostly under the sink and in the drawers, so I figured they got in there somehow.
There is a panel to the left of the door under the sink, held on with 3 screws. It is a partition to the area where the power box is. I removed the panel, and lo and behold - Jayco had drilled an at least 4" diameter hole right through the floor for the fresh water fill, leaving plenty of space for our little friends to just scamper right in.
What are they thinking when they leave holes this size unfilled and hidden???
Needless to say, the hole is now sealed, along with a few other little gaps along the back where the city water etc come in.
So, maybe you all want to take off a few of those panels and check.