Winterizing - Open vents

JMO but duct tape residue is a minor consideration if it means stopping an intruder. Reflectix is a great product to use for sealing any of these potential rodent entry points ... I've done mine in previous years but one year overlooked the furnace vent and the following spring discovered a mouse (or mice) had made it into 2 of the 5 heating ducts in the trailer. The smell was AWFUL and the only way I could fix it was to replace the ducting. I suspect the mouse (or mice) climbed up the ADCO cover and made it's way into the duct by way of the furnace vent as there were absolutely no droppings or other signs he/she/they had made it into the trailer itself. When prepping the trailer for winter storage I close the vents, all windows, distribute Fresh Cab rodent control in the trailer, and put out a container of Dry-Z-Air and always find the trailer fresh & clean in the spring. :B