Adding salt brings a granular substance to the mix, giving you an abrasive texture that helps gently scrub the stain.
I keep it handy in my laundry room to remove rust stains from the inside of my clothes washer. No big deal. I see a spot, I hit it with BKF Soft Cleanser and a soft cloth and it disappears.
Don't be the lazy type when it comes to treating stains on white clothes! Removing them while it happens is a must if you want to keep them radiant. Using a stain treatment and laundering it is ...