You should clean eggshells thoroughly before adding them to a sous vide bath to prevent contamination. Drying them isn't strictly necessary, but ensuring they are free of debris is crucial.
When using eggshells in a sous vide bath, the primary concern is hygiene. Eggshells can harbor bacteria, including Salmonella, which can contaminate the water and potentially affect the food being cooked. Therefore, a thorough cleaning process is essential.
Here's a step-by-step guide to cleaning eggshells for sous vide:
Rinse the eggshells: Immediately after cracking the eggs, rinse the shells under cold, running water to remove any visible yolk or white residue.
Wash with soap: Use a mild dish soap and a clean sponge or brush to gently scrub the inside and outside of the eggshells. This helps to remove any remaining bacteria or debris.
Rinse thoroughly: Rinse the eggshells again under cold, running water to ensure all soap residue is removed.
Sanitize (Optional but Recommended): For extra precaution, you can sanitize the eggshells by boiling them in water for a few minutes or soaking them in a diluted bleach solution (1 teaspoon of bleach per gallon of water) for a short period, followed by a thorough rinse.
Drying (Optional): While not strictly necessary, you can allow the eggshells to air dry completely before adding them to the sous vide bath. This can help prevent any potential transfer of moisture to the food being cooked.
Always use fresh eggs and clean them immediately after cracking. Avoid using eggshells from eggs that have been sitting out at room temperature for an extended period, as they are more likely to harbor bacteria.