The simplest ways to get rid of fleas on cats include the following:
1. Use flea and tick medication: There are many flea and tick medications specifically designed for pets on the market, such as drops, tweezers, oral medications, and sprays. These products are usually the most effective method because they can kill adult fleas and their eggs.
2. Regular grooming: Use a special flea comb to groom your cat's fur. This helps remove adult fleas and their eggs, and can relieve your cat's itching. Be careful when grooming to avoid irritating your cat's skin.

3. Clean your home environment: Fleas can be found not only on pets but also in your home. Regularly wash your pet's bedding, carpets, furniture, etc., and treat your home environment with flea control spray to kill fleas and their eggs.
4. Bathing: Bathing your cat is one way to get rid of fleas, but not all cats like baths. If your cat is okay with bathing, you can use a special pet shampoo or conditioner to remove fleas. Make sure to use cat-appropriate shampoo and be careful to avoid getting water in your cat's ears and eyes.