The best option is to take your bag/pouch to the dry cleaners. If this does not work for you can always hand-wash your bag.
Here are the hand washing instructions:
1. Soak in cold water for up to an hour with a little soap or mild detergent.
2. Use a soft brush to clean any spot.
4. Do not fry the bag too hard to care for the fibers.
5. Extend on a flat surface and let dry.
*If possible, take out or cover with a plastic sheet and tape all the metallic or natural hardware.
*Protect the leather label with a plastic sheet and tape before soaking it in water.