Mistake No. 6: Leaving the bleach on too long Rule of thumb: at-home bleaching generally should not exceed 45 minutes. If you think keeping the bleach on for an extra fifteen minutes will lead to a brighter blonde, you're in for a disappointment. After 45 minutes, the bleach will stop lifting up your hair color and will start cooking your strands. This may leave your hair super dry, brittle, or worse, cause hair fallout.
A pro-tip to keep in mind: Apply the bleach an inch away from the scalp for the first 30 minutes and apply it on the roots after. Your roots are much more virgin which makes it easier and faster to bleach — they typically only need 15 minutes or so. Don't forget to check your hair every 10 minutes throughout the process.
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