Boomding, I feel your pain and if I may, I'd like to vent my own experience this year...I pulled my '06 Apex out of my shed on 11/24 only to find that mice had chewed a 6" hole in the cover and used the material to take up residence in the engine compartment. Not only that buy they had chewed up many of the overlapping seams on the cover for bedding material as well. I was beside myself. I usually keep traps and bait in my shed and while they would occasionally get in they never messed with my snowmobile. I vacuumed out enough bedding to cover the bottom of the shop vac about 6" high. Luckily once I cleaned everything up there wasn't much of a smell and when I checked the air box it was clean. I covered the machine in traps and bait and came back mid December and rode a little over 200 miles before loading it up on my trailer to bring home to IL. When I uncovered my trailer I found another nest in the spare tire and droppings and debris covering the entire bed of the trailer. Ok, it happens, they can't do much damage to a trailer, load it up bring it home. In my garage at home I think to check the support bars under the trailer...sure enough there's a mouse staring back at me! I brought one home with me!! That was it, I took the trailer straight to the car wash and flushed the openings with the pressure washer, then dropped my sled at the shop with instructions for them to tear it apart. They found another nest under the seat near the gas tank, the dinning table down by the battery AND the entire bottom of the air box (below the filter) was stuffed with acorns...oh, did I mention I just bought this gem, and cover, 2006 Apex with only 1100 miles at the end of last season and only have ridden it about 500 miles? GTL, you hit it on the head, the only good mouse is a dead mouse.