Pepper Spray Hazardous Waste Trash Pepper spray that is still full needs to be disposed of as Household Hazardous Waste. It is difficult to tell if pepper spray is empty. Pressurized cylinders pose a slight risk for explosion when traveling through the Materials Recovery Facility (MRF) processing line and/or baled to be recycled with other metals. Pepper spray containers are technically recyclable given their metal content; however, we want to protect our staff from potential risks. *SAFETY TIP: Do not leave any pepper spray inside a car or confined space that gets hot; it can explode. Not Empty? It’s Hazardous Waste Pepper spray presents a risk for sanitation workers and waste facilities. If there’s even a drop of liquid left inside of an aerosol canister, it is still pressurized and can explode, so dispose of it as hazardous waste. Leaking? Seal It in Plastic If your pepper spray is leaking, put it in a plastic container with a tight, secure lid, then dispose of it as hazardous waste. While transporting, keep the pepper spray in a well-ventilated area. Avoid Contact With Skin or Clothing If pepper spray gets on your clothing, remove it while avoiding touching your face, cutting off your shirt if necessary. Then wash your hands and any other affected areas with soap and cool water. Did You Know? What Is Pepper Spray? How Often Should You Replace Pepper Spray? Always follow manufacturer guidelines when it comes to replacing your pepper spray. If your pepper spray doesn’t have a listed expiration date — as a general rule of thumb — you should replace it every three to four years.