Pay Attention to the Shampoo You Use
We'll start here. When washing styles like box braids or weaves, it's important to remember that since most of your hair is tucked away, you likely won't be able to use the same kind of shampoo that you normally would since it'll be a little harder to rinse out. To ease this process, we'd recommend diluting your regular shampoo with water and applying it with an application bottle. You can also look into using a shampoo with a more water-based formula, like Carol's Daughter's Wash Day Delight Shampoo ($11).
Make Sure You're Being Gentle
Again, since most of your hair is braided up, the area you should be paying the most attention to is your scalp. But to avoid frizz and flyaways, make sure that you're being gentle while your sudsing up and getting all of that buildup off of your scalp. We recommend applying your desired shampoo product directly to your scalp and then lightly massageing it in a circular motion for about a minute before rinsing it out.