Question: how often should i wash my hair with blue shampoo?
Answer: How Often Should I Use Blue Shampoo? Hairstyling pros recommend sudsing up with blue shampoo once a week to cancel orange or red tones out of brown hair color. For more toning, leave it in your hair for two or three minutes before rinsing. Don't worry if your blue shampoo hits the shower tile--it will rinse out.