When cleaning hanging drapes, it is important to start by vacuuming the fabric using a handheld vacuum cleaner or an upholstery attachment. Be sure to move the vacuum in a back-and-forth motion at least twice over the surface of the fabric. After vacuuming, spot clean any stains with mild detergent and warm water. If necessary, use a soft cloth soaked in cold water for more stubborn spots. Once all visible dirt has been removed from the draperies, hang them outside and spray them lightly with a hose on both sides before allowing them to dry completely in direct sunlight.