I spray a bit of remover in the hair, alcohol/lace release also works. Wait a few minutes and then carefully comb out the crud with a flea brush. I would suggest using a new one! You can pick them up at any pet supply store for a few bucks. For those who don't know they typically small and have metal combs that are very tightly spaced. I also find the comb great to make a dent in my head for a guide before applying glue to the front.