You have a secret weapon in your kitchen: vitamin C. Crush up a bunch of tablets (like 10 or 15) and mix them with your clarifying shampoo. Make a gritty paste.
Slather it on damp hair and let it sit for 30 minutes. It smells weird, like sour candy. The vitamin C is an acid that literally dissolves the dye molecules.
Rinse it out, and poof—your blue is now a sad, muted gray. It works like $80 salon remover, but costs pocket change.
The Baking Soda Gamble
Baking soda is another option, but use it with extreme caution. Mix a tablespoon with shampoo and scrub it in. It’s like sandpaper for your hair.
Quick Tips To Fade Red Hair Dye Faster And Safely | ShunSalon
This method is a nuclear option. It will strip color fast, but it can also destroy your hair’s texture. You might end up with frizz that has a mind of its own.