There are organic detergents such as Molergent which is a combined mold treatment and laundry detergent available on the market and is proven to be very effective. However there are alternatives which you may already plastic molds have at home. Try lemon juice and salt which you apply to the item of clothing and leave to dry in the sun. Chlorine bleach is another option. Dilute 2 tablespoons in about a quart of warm water and leave the stain to soak for between 5 and 15 minutes, then rise and allow to dry. The big draw back with using bleach is that it should not be used on wool or silk items and it can take the colour out items so caution should be taken if going for this option.
Mold treatment in soft furnishings can be a real pain. There are a few options however, first step is the same no matter what you are trying to remove mold from. Take the item outside and brush loose mold off, then use a vacuum custom molds cleaner and suck up as much mold dust as possible. Remember – mold dust can be toxic so be sure to wear a face mask, goggles etc. The next step is to dry the item out preferably outside in the sun but if this is not possible you could use a heater or a dehumidifier would be useful for this task.