“We applied this to our two kittens 2 days ago, and twice a day we have been using a flea comb to get any residue fleas from the kittens. I would recommend anyone using this product to invest in flea comb and create a routine until all fleas have gone from the kitten. Just fill a container with hot water and one with cold have some paper towel to dry the comb and work this through the kitten.”