This trap involves using an empty paper towel roll set over the edge of a shelf, just barely balanced, with a spot of peanut butter inside the end of the tube. The bucket contains water. When the mouse travels the length of the tube his weight causes the tube and himself to fall into the water. I set this up last night and this morning the tube was in the water but the mouse wasn't. I don't know what went wrong but I suspect the tube may have been too long giving the mouse an opportunity to reverse up the inside of the tube and to escape up the sides of the bucket. I may try this again with a shorter tube.
Here's what I'm trying tonight. The Coke can is suspended over the bucket by a wire. The can will easily spin. I placed a smear of peanut butter in the middle of the can. The theory is that the mouse will come down the gang plank, crawl up onto the can and when the can spins he will fall into the water. I added a drop or two of liquid dish soap to the water to make it impossible to climb up the walls of the bucket.
There are some who would suggest that I catch the little varmint live and let him loose in the woods. But, this mouse is exceptionally intelligent and can't be allowed to pass his Mensa quality genes to his progeny or we'll have a tribe of rodents who will be unstoppable and eat every crumb of food in our house in a very short time. It's him or me.