So few months ago we moved to North Dakota. Rambo is 3 years old and never had a thick problem before. he gets his Hartz drops for fleas and thicks every month. Recently he cought a thick right on his chin. I gently rubbed the spot with flea and thick shampoo and after few minutes the thick came right off. i was wondering if theres any other ways to get those things out. Thanks for your input!!!