Never add undiluted bleach directly to clothes. Even whites will stain if you don't use a diluted bleach cleaning solution. ... Mix the powdered bleach with warm water until all the powder dissolves. Just like with washing, you should spot test the fabric before putting it into the bleach stain removing solution.

What happens if you water down bleach?

If you dilute your bleach into an ordinary spray bottle, the bleach can react with the metal parts of the trigger spray nozzle and cause rusting that can further reduce the effectiveness of your cleaner, according to Jessica Ek, director of digital communications at the American Cleaning Institute.

Can bleach be watered down?

Bleach should always be diluted with water first before use — it should never be applied full strength to anything! ... Bleach works best diluting it with water and diluting bleach also makes it safer to use. Rinsing thoroughly after using the disinfecting bleach solution should prevent any residue from being left behind.