If your nursing pillow isn't machine washable or you'd like to keep it clean between washes, it's a good idea to keep some chemical-free spot cleaner on hand. One option is to apply mild soap or detergent to the area and gently rub before wiping away with a damp cloth. Raw apple cider vinegar also works well as an antimicrobial cleaner. To make your own antifungal, antibacterial, and antiviral spot-cleaning solution, fill a spray bottle with equal parts water and apple cider vinegar. Lightly spray your nursing pillow and allow to air dry.