Eggshell Powder Is a Natural Abrasive Cleaner

## Why It Works Eggshell powder (calcium carbonate) is a mild abrasive — hard enough to scour mineral deposits, limescale, soap scum, and oxidation from hard surfaces, but soft enough not to scratch glass, porcelain, or stainless steel. It's the same abrasive action as commercial cleaning powders like Comet or Bar Keepers Friend, but gentler and made from something you were going to throw away. Combined with dish soap, it gets the chemical and mechanical action of a proper cleaner. ## How to Do It 1. Dry eggshells thoroughly. Bake at 200°F for 20 minutes or air dry for a few days. 2. Grind to a fine powder using a coffee grinder, food processor, or mortar and pestle. 3. Mix with dish soap to form a paste. Ratio: about 2 tablespoons powder to 1 teaspoon soap. 4. Apply to the surface with a damp cloth or sponge. 5. Scrub in circular motions. 6. Rinse thoroughly with water. The white powder residue disappears completely when rinsed. 7. Buff dry with a clean cloth for chrome or stainless steel. ## Pro Tips - Finer powder is gentler. For delicate surfaces like porcelain sinks, grind to near-powder consistency. - For grout lines: mix eggshell powder with baking soda and a little water for a grout-cleaning paste. Apply with an old toothbrush. - Store excess powder in a sealed jar. It keeps indefinitely and you can add to the jar from each batch of eggs. ## When to Use This Cleaning stainless steel sinks and appliances, removing water spots from chrome faucets, scrubbing grout, or anywhere you'd normally reach for a commercial scrubbing powder.