I tried dying my laundry blue with Mrs. Stewart’s Concentrated Liquid Bluing to see if the $5 solution could help make my dingy white T-shirts look bright again.

2 cups of water; 1 cup of white vinegar; Soak the sweat-stained garment in this mixture for 30 minutes. ... Sunlight: UV rays are a natural bleach for removing sweat stains from white shirts.