How to keep deep wavy hair wet Since many people use deep wavy hair extensions, they usually face the question: how to keep deep wavy hair looking wet? For many reasons, people always want deep wavy hair to be wet. And one of the main reasons is to keep them in place. Other reasons include getting a style that is ideal for a particular occasion. If you have purchased a human hair deep wavy wig, you must know the right way to maintain it. Especially wavy and curly hair textures can become very tangled, dry and lose definition if not properly cared for. Therefore, you must know how to make deep wavy hair look moist.