Wash your wicking pajamas in cool or warm water on gentle cycle. Never use fabric softener or fabric softener sheets because it will minimize the wicking properties of the fabric. If you accidentally use fabric softeners, re-wash the garment in clear water to remove softener residue, so the wicking properties will return to maximum effectiveness.
Hang to dry or tumble dry on low. Tumble drying won't damage your moisture-wicking pajamas, but can sometimes create static.