The simplest way to completely eliminate cat fleas is through a combination of treatment and prevention. First, use a pet-specific flea medication, such as drops, oral medication, or spray, following the instructions and ensuring the medication does not get around the cat's eyes. Second, bathe your cat regularly with a pet-specific anti-flea shampoo, which helps clean the fur and reduce flea infestation.

At the same time, pay attention to cleaning your cat's living environment, including bedding and toys, which can be treated with insecticides or replaced regularly. Finally, regularly treat your cat for internal and external parasites to prevent reinfection with fleas. Through comprehensive treatment and preventative measures, you can most effectively and completely eliminate cat fleas.