Depending on the size you may need to take it to a commercial Laundromat to wash. I would definitely wash the starch out. If you take it to a Laundromat, do not leave it alone. Stay until it's finished. Easy pickings for thieves. Don't rely on the mgr to watch it either. If it just has a little, you may be able to gently agitate in your bathtub then let drip dry.