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You shell out a small fortune for a pro dye job only to come out of the salon in tears. If the color is too dark, don't panic. Remember that bottle of Prell shampoo your Grandma always had in the shower? Pick some up and use it to tone down your hair color. Just work fast. The quicker you take action at lightening the color, the more successful you'll be.
Turn the shower on with the hottest water you can tolerate. You don't want to scald yourself, but hot water works best at stripping hair color.
Soak your hair with water. Squirt about a quarter-sized amount of Prell shampoo into the palm of your hand.
Work the shampoo thoroughly into your strands. Use your fingers to scrub your hair and scalp.
Leave the shampoo in your hair for a few minutes before rinsing it out with water.
Several consecutive applications of Prell may be necessary to lighten your hair color to the shade you want. After you've achieved the desired color, condition your hair well.
Add 1 tsp. of baking soda to the shampoo for further lightening power.