of dish soap and gently rub over the burnt-in areas.
Only use this method for pans that can tolerate some scrubbing. With sensitive non-stick coatings, you better take a soft sponge.
2. Eggshells in the garden
This is perhaps the most well-known application.
Eggshells are made in large part of calcium carbonate. Let it dry well, grind or crumble as finely as possible, and mix it with compost or potting soil.
Don’t expect an immediate growth spurt, because eggshells are slowly decomposing. However, they can become part of the soil
