Why Stains Mysteriously Appear on Clothes After Washing While it is rare for a washer or dryer to stain clothes, identifying the specific origin of the stain can be a difficult task. Stain identification is further complicated since many substances (beverages, foods, cooking oils, medicines, hair care products, etc.) are clear when they come in contact with the garment, then the heat of laundering oxidizes the stain causing it to appear. The best approach to identifying stains is to look for evidence which indicates the most logical source. The following information will help identify common stains and what to look for when there is a "mystery" stain: Fabric Softener Stains A colored, blotchy stain with a greasy feel may be caused by rinse-added fabric softener. The color of this stain will vary depending on the color of the fabric softener. In addition, the stain may turn a "dingy" gray color and feel greasy if it attracts soils from the load. Dryer-added fabric softener sheets may also stain clothes. These generally appear as streaky, translucent, oily stains. Both rinse-and dryer-added softener stains can be removed by rubbing the dampened stain with a bar soap (Lux, Ivory*) and relaundering. Rust Stains Yellow, orange or red stains may be caused by iron or manganese in the water supply or from rusty water heaters and pipes. Use the Rust Test Kit (part # 038195) to determine if the stains are caused by rust. Rust stains are not removed by chlorine bleach, instead they are made darker. A rust remover such as RoVer Rust Remover (Part # 57961) or Whink* should be used. For more information on rust stains see Form No. 788CG. Mildew Stains Mildew creates a spattering pattern of gray/ black "pinprick" stains. These are often found on children's garments, outdoor cushions, camping gear, shower curtains, etc. To remove mildew, pretreat the stains and launder in the hottest water appropriate for the item. Use chlorine bleach if safe for the fabric. If the stains remain, sponge with hydrogen peroxide, rinse and relaunder. More stubborn stains may be permanent.