How to Build and Use a Mouse Cannon
In a moment of desperation, I added what I know to what I have and came up with the simplest — and most effective — mousetrap I’ve ever used. Click the images to view full size.
The main tube of mine is about 27 inches long, and it’s 4 inches wide. You can use a cardboard tube if it’s smooth enough, but you might want to paint the inside anyway to waterproof it. Metal would work fine too, of course. The bottom part has to be waterproof if you use the wet method of mouse deletion. It should not be any shorter, lest the mice jump out.
Getting rid of the mouse may be a problem for some. My method is to dump in some water and put the cannon on an unheated porch for an hour or so. Hypothermia takes down the wet mouse, and there is only body disposal to deal with. Whatever you do, don’t just softheartedly dump a live mouse outside, because it will just come right back in.
After deleting the mouse, add fresh peanut butter and re-deploy the cannon. Smearing the peanut butter with a small piece of cardboard or paper and dropping the disposable utensil in the tube adds to the allure. So will adding a slice of potato or apple, if your mice are seeking out moist food.
Good hunting! I caught 8 mice in about a week and a half.
Infographics hastily and crudely executed in InkScape, with a little help from The GIMP.