Use it to pretreat oily (or otherwise tough) stains, like chocolate, makeup, baby formula, and ring around the collar. “Wet the bar, rub on, let sit for a few minutes, and wash as usual,” says Steve Boorstein, the author of The Clothing Doctor’s 99 Secrets to Cleaning and Clothing Care. According to a devoted Facebook fan page, Fels-Naptha is also a great shower cleaner. Rub a nonabrasive scouring sponge with a wet bar and start scrubbing. And scientist Jessica Lawshe,who works for Dial (which is owned by the same parent company as Fels-Naptha), recommends grating 1/16 of a bar into the washing machine “to give your detergent an extra kick.”
To buy: $3.50, soap.com.