Unzip your bag and remove anything that was in it. Your bag needs to be totally empty.
Put the bag in your laundry machine on the normal cycle that you would normally use. The only difference is that you need to use hot water!
Let it wash as it normally would, but during the spin cycle, add 1 cup of white vinegar.
Once it's done, remove and take it outside in sunlight to air-dry for 24 hours, inside out.
Unzip the bag and remove all items. Launder clothing in the bag as you normally would except add 1 cup of white vinegar to the spin cycle.