put your dowel through a toilet paper tube. Put peanut butter on toilet paper tube.
The issue is that the dowel needs to be perfectly made and since I made it... that would not be the case.
You cannot have a "low spot" where the dowel (or whatever... soda cam, toilet paper roller, etc) will 'rest'. It has to spin freely. Each mouse only weighs from .5 to about .75 ounces so they can walk across a roller that is not freely spinning. Plus, with a wooden dowel I bet the mice can get their claws in there. The stainless one won't let them hang on like that and possibly get away. I was as meticulous as I could be making the dowel roller and when I saw a low spot I tried to adjust it but it still wasn't perfect... although I did catch ONE.