You had some that stayed up?!
I'm not sure I ever saw more than one or two - tops - that were not on their sides rolling around having a dubious time of it. The same goes for the cows on another mechanical "wonder."
If you are having problems with the cans remaining upright, and the platform is at the right height, I would suspect that the voltage is too high.
If the voltage has to be set high to get the mechanism to operate then the problem is most likely to be dirt and grime.
Folks might be surprised to see what cleaning and polishing all the parts in the mechanism can do for the operation of the milk cars. Do not lubricate sliding surfaces.
