George W. Bailey / Shutterstock.com Flea Products Hazardous Waste George W. Bailey / Shutterstock.com Never Dump Down the Drain Flea products contain chemicals that can harm waterways, so never put them in the garbage or flush them down the drain. Instead, dispose of them as hazardous waste. Empty Containers Go in the Garbage If the flea product container is empty, throw it in the garbage. Also throw away any 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. Bathe them regularly, vacuum your home once a week, wash pet bedding once a week in hot, soapy water and use a fine-tooth flea comb on a regular basis.