1. Cleaning conch shells: Gently clean the surface of conch shells with warm water and neutral detergent to remove dirt and deposits. Avoid using too strong detergent to avoid damaging the surface of the shell.

2. Drying the conch shell: Place the cleaned conch shell in a ventilated area to dry and make sure it is completely dry.

3. Apply Vegetable Oil: Use a cotton ball or soft cloth dipped in a small amount of vegetable oil and apply it evenly on the surface of the conch shell. Vegetable oil adds luster and protection to the shell.

4. Use conch shell brightener: there are some brighteners on the market that are specially designed for treating shells and can be used according to the product instructions. Usually the gloss is applied to the shell surface and then gently wiped with a cloth to make it shine.

5. Protection from sun exposure and humidity: Conch shells are susceptible to sun exposure and humid environments, so you should try to avoid exposing them to sunlight or humidity to prevent discoloration or damage to the shell surface.