There are a few ways to clean gun grips. One is to use mild soap and water. Another is to use an all-purpose cleaner. A third is to use rubbing alcohol.
To clean with soap and water, wet your grip with warm water and add a small amount of gentle soap. Rub the grip until it is clean, then rinse it off with warm water and allow it to dry completely.
To clean with an all-purpose cleaner, spray the grip thoroughly and allow it to sit for a few minutes before wiping it off with a cloth or sponge. Rinse the grip with cold water and allow it to dry completely.
To clean with rubbing alcohol, spray the grip lightly and rub it with a cloth or sponge. Rinse the grip with cold water and allow it to dry completely.