Scattering crushed shells around your plants and flowers can help deter slugs, snails, and cutworms that ruin your garden without using pesticides. They also work to keep deer away if you have them in your area!
Clear the drain 2
Is the drain in any of kitchen sink clogged? Crushing a couple of egg shells into your kitchen sink strainer will trap solids and keep them from clogging your pipes. As they break up and go down the drain, they'll also help clean whatever's stuck in the pipes.
Make coffee 3
Adding an eggshell to coffee grounds in the filter can actually make your morning cup o' joe taste less bitter!
Clean your house 5
Mix crushed eggshells and a little soapy water to clean vases or use as an abrasive on dirty pots and pans.
Treat skin irritation 6
Dissolving an eggshell into apple cider vinegar for about two days produces a formula that can help minor skin irritations.