Take a damp towel or sponge with a mild detergent and wipe clean.
For greasier, more stubborn dirt - try plain dish soap or a cleaner like simple green.
Can you wash your bag in the washer? We do NOT recommend it.
The fabrics have waterproofing coatings on the inside that can be washed away in the washer.
Some features of the bag might bleed or run.
It will void the warranty.
NEVER put your bag in the dryer.