To maintain your curly crochet hair while you sleep, it's important to follow a protective practice to preserve the curls and reduce frizz.

Begin by gently detangling the curls using your fingers or a wide-tooth comb to release any knots or tangles.
Next, you can gather your natural hair into a loose pineapple or bun at the top of your head to control crushing the curls while you sleep.
Protect your hair with a satin scarf, or sleep on a satin pillowcase to minimize friction. These materials reduce frizz and keep the hair hydrated. For added protection, you can also wear a satin bonnet over the scarf or pineapple style. This simple routine will help maintain the shape and longevity of your curly crochet hair, keeping it fresh and bouncy for longer.