Dry and Dull Hair
Harsh chemicals and intense heat from styling tools can strip away your hair's outer layer, robbing your hair of moisture. Roberts recommends restoring moisture through hot oil treatments. You can use any oil that you have in the house — for example, safflower, canola, olive. Heat it up so that it is warm but not too hot. The important thing is to massage it into your scalp, she says. Then put on a shower cap for about an hour, then rinse or shampoo out the oil.
And yes, it's true, mayonnaise works as a conditioner. Slather your hair with a generous dollop, put on a shower cap for up to an hour, says Roberts.
To enhance shine and remove build-up of oils from shampoo and styling products, try an apple cider vinegar rinse, says Roberts. Mix 1 tablespoon of apple cider vinegar to 1 cup of water, apply it to your hair and then rinse. If smelling salad-like is a concern, she says, you can apply your regular conditioner afterward.