Brushing your hair when it's wet with a comb or a regular brush can cause it to become frizzy as it dries. Instead, flip your head over when your hair is dry and use a boar bristle brush to detangle your hair. This will help to distribute the natural oils on your scalp to the rest of your hair. Ionic heat styling tools encourage hydration by injecting negative ions into your hair. When your hair is wet, it is positively charged. An ionic hair dryer, for example, will help your hair to soak in moisture instead of pulling moisture out of your hair. Make sure that your hair is 100% dry before you use a curling iron or straightener, in order to avoid burning and damaging your hair. It's best to let your hair air dry completely, but if you're in a hurry, blowing it dry before you use styling tools is much better than styling it when it's still damp. Stay away from wet-to-dry styling tools. Although they claim to be designed to style and dry your hair at the same time, they'll likely still damage and dry out your hair. Heat styling tools, such as curling irons, flat irons, and blow dryers, can have a drying effect on hair. To keep your tools from drying your hair out, apply a heat protectant spray to the length of your hair beforehand. This will also keep your hair shiny and minimize frizziness. If your hair is dry, it's best to avoid heat styling tools, such as flat irons, as much as possible. If you just can't stay away, turn the heat down to minimize the damage done to your hair. Use your heat styling products on the lowest setting. There are also many ways that you can straighten your hair without using heat. Try using a straightening hair mask or sleeping with jumbo rollers in your hair at night. If you want curls, consider swapping your curling iron for rollers. They have a similar effect and are less damaging. Consider wearing your hair in a messy bun, a tight ballerina bun, or a french braid from time to time instead of using heat styling tools. Dyeing your hair can be extremely damaging, and can make it look weak and dry. If you're wanting to fix your dry hair, you'll need to take a step back from dyeing it to give it some time to become healthy again. If you can't stay away from the hair dye, consider talking to your stylist about ammonia-free and demi-permanent dye formulas that aren't as harsh on your hair. Stay away from harsh bleaches while you restore your hair's health.

Summary:
Brush your hair with a boar bristle brush. Use ionic thermal heat styling tools. Use heat styling tools only on completely dry hair. Use heat protectant spray before using heat styling tools. Turn down the temperature on your heat styling tools. Take a break from dyeing your hair.