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Because fleas grip tightly to hair and fur, and their eggs can be tightly attached as well, a tight comb must be used to remove them. There are combs specially designed for this purpose. Make sure the teeth of your comb are the right length and tightness for your pet. This will allow you to drown any fleas you comb out. It will also help to wet your pet as you comb, helping to control the movements of any fleas. Make sure the water is warm, but not hot. Go from root to tip, and from head to tail. This is an especially important technique when combing out fleas. Fleas like to hold on by the root. If you do not comb up the entire length of the hair, you are likely to miss some. It may seem tedious, but the time you put into manually removing the fleas can pay off. This can be a very effective measure in controlling and eliminating your pet's flea problem. Don't rush through combing your pet, or it might lengthen the treatment process. Comb your pet for fleas more than once. It will give you an opportunity to monitor you pet for new fleas, as well as check the condition of their skin. Look not only for fleas, but check for signs of irritation or injury from treatment.

Summary:
Get a flea comb or tight-toothed comb. Keep a bucket of water nearby. Comb out the fleas always in the direction of fur or hair growth. Take your time. Repeat this every couple of days. Be aware that the fleas only hop onto the pet to feed and mostly live in the environment - thus it takes a long time to bring an infestation under control by combing.