If your cat brings in fleas, it’s time for serious cleaning. Vacuum every day, including upholstered furniture, cracks in the floors, and along baseboards. Then replace the vacuum bag or wash the canister in warm, soapy water. Wash or replace any bedding where they sleep (including yours), and consider steam cleaning your carpets. Use a flea comb on your cat, and then treat them with flea meds. Flea sprays are better than flea "bombs" to treat your home. Always check to make sure any home treatments for fleas you use are safe for cats. And be sure to follow the instructions carefully.