At the first sign of fleas in your home, reach for Advantage Household Spot & Crevice Spray. Scientifically formulated with highly-effective ingredients, this spray works to kill fleas, bed bugs, dust mites, brown dog ticks and other household pests on contact for up to two weeks. If you’re still seeing fleas after application, it may be because your pet has picked up new fleas from the environment, which may include other pets, surfaces and outdoor areas. It may take up to 30 days to break the entire flea life cycle. Additionally, you should also treat sources of new fleas (i.e., carpet, yard, etc.) to ensure complete flea control.