George W. Bailey / Shutterstock.com Flea Products Hazardous Waste George W. Bailey / Shutterstock.com Find out what to do with hazardous waste Never Dump Down the Drain Flea products contain chemicals that can harm waterways, so never dump them in the trash or down the drain. Instead, dispose of them as Household Hazardous Waste. Empty Containers Go in the Trash If the flea product container is empty, throw it in the trash. Also throw away single-use pipettes. Did You Know? Prevention Is the Best Medicine Commercial flea and tick products contain chemicals that can pose health hazards to both pets and humans. You can eliminate the need for flea products by grooming your pet: keep them flea-free by bathing them regularly, vacuuming your home once a week, washing the pet bedding once a week in hot, soapy water and using a fine-tooth flea comb on a regular basis.