All you need is an adhesive remover. Anything you would normally use for hairpieces will do. Alcohol doesn't work well because all it does is soften the adhesive for a couple of minutes. As soon as it evaporates the adhesive gets sticky again.

- Saturate the hair with adhesive remover

- Allow to penetrate 10-15 minutes

- "Roll" the clumps of hair between your fingers to separate the strands of hair

- Re-soak any stubborn areas

- Use a soft toothbrush to carefully comb through the hair to further separate the hair strands

- Wash immediately

The trick is to separate the strands of hair. If you manage to do this, the adhesive remover will penetrate fully allowing you to shampoo the residue away more easily.