Tip #1 - Take a cottonball soaked in 91% or 99% alcohol and in a circular motion, slowly & gently remove the adhesive from the perimeter of the unit.
Tip #2 - After majority of the adhesive is removed, fill a basin with cool water and pour some Neutrogena Shampoo Anti-Residue Formula* in the water. Soak the lace cap in the water using your fingers to gently massage the perimeter of the lace to remove the build up of residue.
*I use this shampoo to clean my makeup brushes and decided to try it on one of my wigs to remove build up. It works like magic! This product can be found at Walmart and Target.