If you have a sally's or other beauty supply store like it you can buy Barbicide. It's what is used in Salons and Barber shops to clean their brushes and combs and it kills bacteria and things like that. You dilute it in a container with water and just put your brushes and combs in there and let them soak for about 10 minutes. Heres some info on barbicide:
U.S. EPA registered, hospital grade, broad spectrum disinfectant
Kills pseudomonas, staph and salmonella
Germicide, Pseudomonacide, Fungicide and Virucide
Original Barbicide Kills HIV-1 (AIDS virus), Hepatitis B & C on precleaned environmental surfaces/objects previously soiled with blood and body fluids. How to use: Mix 1 ounce with 32 ounces of water and use on countertops and equipment. Thoroughly cleanse implements by immersing for 10 minutes. Soak and then rinse implements I believe barbicide is your best bet!