Do not put egg shells down the garbage disposal to sharpen the blades. Garbage disposals do not have blades and the impellers are blunt. The membranes from egg shells can cause damage to your garbage disposal if it gets wrapped around the impeller. If you have any issues and need a plumber, contact Putman & Son’s Plumbing. Our certified plumbers can fix or replace your garbage disposal or tend to any of your plumbing needs.