You've just taken out that fly weave that's kept your hair protected these past several weeks. You're ready to move on to the next style, so after all the weave hair is removed, you're about to hit the showers.
Before you put a drop of water on your hair, detangling is a must. If you put water on hair that's been braided away for weeks on end without combing through it first, it'll probably draw and shrink right up into a matted nightmare that you may never get untangled. Then you'd have to cut off all of that new growth that you love so much.
Immediately after taking out a hair weave, take the time to section your natural hair and comb through it with a wide-tooth comb, one small section at a time. You'll see a lot of hair come out on your comb. This is the hair that normally would have shed daily and even though it seems like a large amount, it's not cause for alarm. Comb through all sections of your hair. Once that's done, you're free to shampoo and condition.