Water stains on your washables should be laundered as usual.If your items are dry clean only or hand wash only, follow your normal procedures and hand wash or take to your dry cleaners for cleaning.
Most water marks on washable fabrics will come out of the material when they are washed, but for heavy drapes or curtains, some water stains will not come out but make sure that you tell your dry cleaner specifically that you are fighting a water stain so they know what stains they are working on.
