Washing a throw blanket is simple, but you must take care to prevent damage. First, check the label for washing instructions. If the blanket is machine-washable, use a gentle cycle with cold water. Add a mild detergent and wash alone or with other items of similar fabric. To dry, use the lowest heat setting on your dryer or air-dry. If the blanket is dry clean only, take it to a professional cleaner. To keep your blanket soft, avoid using fabric softener. Instead, add ½ cup of vinegar to the rinse cycle or use wool dryer balls. You can also fluff your blanket in the dryer on low heat for 10-15 minutes after it is dry.