This one is sneaky. If you have hard water (water with lots of minerals like calcium and iron), it is like having a tiny, invisible sandpaper running over your hair every time you rinse. These minerals build up, dulling your color and causing it to fade faster. You might notice your hair feels rough or a bit “sticky” after a wash. That is the mineral residue.
How to Keep Your Hair Color from Fading: NJ Hairstylists
A chelating shampoo (a special deep-cleaner for hard water) used once a week can be a game-changer. It is like giving your hair a little detox so the color can breathe again.