You shouldn’t try to machine wash your anti-theft bag, as the theft-proof features like the inbuilt mesh can bend and break and eventually poke through the bag’s fabric. RFID-blocking layers in the pockets can lose their effectiveness as well. Most of the time, you can just wipe down the outside of the bag with a damp cloth if th efabric is polyester or nylon. Plain soap and water using a soft scrubber/washcloth or toothbrush is great for spot cleaning of stubborn dirt stains.