Here are the recommended cleaning and disinfection procedures for brown contact lenses:

Cleaning:
1. Wash your hands thoroughly with soap and water before handling the contacts.
2. Gently rub the contacts with your fingers and a contact lens cleaning solution to remove any deposits or buildup.
3. Rinse the contacts thoroughly with brown colored contact lenses solution to remove any remaining cleaning agents.

Disinfection:
1. After cleaning, soak the contacts in a fresh contact lens disinfecting solution for the recommended soak time, usually 6-8 hours or overnight.
2. Make sure to use a solution that is approved for the type of contacts you are wearing. Check the product label or with your eye care provider.
3. Never reuse disinfecting solution. Always use fresh solution each time.

Additional Tips:
- Replace your contact lens case regularly, at least every 3 months.
- Avoid letting the contacts air dry, as this can lead to protein and lipid buildup.
- Consider using a daily disposable or hydrogen peroxide-based cleaning system for enhanced disinfection.
- Follow the instructions from your eye care provider and the gray colored contact lenses manufacturer carefully.

Proper cleaning and disinfection is crucial to maintain the health of your eyes and ensure safe, comfortable wear of your brown contact lenses.