Remove the phone from the case
Rinse the case with warm water
Add a small amount of mild dish soap
Rub the case gently with your hands or a soft cloth
Use a soft toothbrush for corners and grooves
Rinse thoroughly with clean water
Dry with a lint-free cloth
Let the case air dry completely before putting the phone back
For stains, use baking soda mixed with water to make a paste
For stubborn grime, wipe with a little rubbing alcohol on a cloth
Avoid bleach, harsh chemicals, and abrasive scrubbers