On Fri, 2 Oct 2020 10:14:33 -0400, Wade Garrett wrote:

OK to put egg shells down the kitchen sink garbage disposal?

IMHO, egg shells and ice cubes are excellent items to run through a kitchen
sink garbage disposal, as far as the disposal blades are concerned, but
perhaps not great for a septic system if that's what you have. Potatoes and
potato peels would be among the worst thing for a garbage disposal.