If the mouse is crawling around on the counter, what you do, is put your trash can next to the counter. put a ruler 1/2 on the counter and 1/2 hanging over the trash can. put a little piece of cheese at the end of the ruler.. the mouse will walk out to the end of the ruler and fall into the trash can. that is a way to catch one but not kill it. :) good luck. it is neat how it works. Mice are nosey!