The process is called nit-picking, and is often done with a close-toothed metal comb.
Simon E. Monroe patented a hair straightener in 1906 that was like a metal comb.
Before doing this, rub olive oil in the hair or run the metal comb through beeswax.
These metal combs are easier to find in pet stores or on the Internet than in pharmacies.
There's this very good shampoo and you need a fine metal comb as well.
Some of the more complex boxes also have a tiny drum and/or small bells, in addition to the metal comb.
An inexpensive metal comb for doing this is available at paint stores.
Groomers sometimes use a metal comb when combing for the second time, paying more attention to the toes and between the toes.
One such decorative treatment consists of small grooves achieved by the application of a metal comb.
The glint was coming from the long metal comb in her hair.