personally if it's a big stain I think someone said they put their toki in a pillow case and then wash it that way... you could do it by hand and there are bunches of methods mentioned in the threads above
409 is a brand of multipurpose household detergeant, usually in spray form. You can get it at any supermarket. It's gentle on fabrics and will remove stains effectively. Just remember to spot-rinse the bag after cleaning.