Thanks for all the replies. First, I don't like the poison methods, as dead mice stink! And who knows where they will crawl into to die. We bought a house in the country one time, and pretty sure I had some dead mice in the wall next to the basement stair way. For a good year, anytime you walked down to the basement, you had to go past that wall. Trust me, it's not a good smell! I have used moth balls in the past, but liked the dry sheet idea better, because of the better smell. Same with Irish Spring. I too have had to replace trailer wiring as the little critters would make mesh of it in the tongue or other internal areas. Last year I stuffed two bars of Irish Spring soap in the tongue as far as I could. The lights all worked ok last year. Not sure if the soap is still in the tongue, but I did stuff a new bar in there last week, so hopefully when I pull the boat out for Hontoon, all my lights and brakes will be working. (No fun trying to fix that late February when our temps here are still below freezing.) I'll probably go back out on the boat this week, after the ice on the cover melts or evaporates, and we have some sunshine and maybe closer to freezing temps. (Below freezing now.) The Bounce fabric sheets seem to have the most endorsements (probably the most aromatic), so perhaps I will buy another box and place them out with the moth balls. Earlier the smell was pretty strong. However, after several months, it kind of lost it's potency. Colby