The adhesive used to bond a glued-in hair weave is not water-soluble and is perfectly safe to wash. A well-cared for glued-in weave will last roughly one to two months before the glue begins to loosen. During that time, you will have to wash your hair regularly to prevent salt, dirt, and mold from accumulating.
Wet your hair with warm water.
Apply a quality shampoo. Squeeze the shampoo at various points throughout your hair, then gently massage it into your scalp, hair, and hair pieces. Do not scrub vigorously, rub, or bunch your hair together as you may normally do--especially if the weave hair is curly. This will tangle the hair weave. As you attempt to free those tangles, the weave may become frizzy or pull free from its bonding.
Rinse the shampoo completely out of your hair with running water.
Apply a quality, cream-based deep conditioner to your hair. Again, squeeze or daub the conditioner in several places all over your scalp and hair, then gently massage in the product. Do not scrub or cause tangling. Leave the conditioner in for the amount of time recommended by the maker.
Rinse the conditioner completely out of your hair.
Pat your hair dry with a lint-free towel. If possible, let your hair air-dry. If you must blow dry it, use a dryer with a diffuser attachment, and avoid holding the dryer directly on top of bonded areas. Dry the wefted part of the hair pieces first, then dry the rest of your hair from the ends up.