1) Disposal Method for Spray Cans (Aerosol Cans) and Cassette Gas Cylinders (Small Household Gas Containers): If any contents remain, there is a risk of ignition or explosion in collection vehicles or processing facilities. Please press the spray button completely outdoors in a well-ventilated area away from open flames until no sound is heard and all contents are fully expelled. Alternatively, if the product has a residual gas release mechanism, follow the manufacturer's instructions to release the gas. Do not puncture or otherwise damage the can. Remove the cap and place it with other empty cans on the designated collection day. Refer to the awareness flyer (PDF) for the URL. 2) Regarding large gas cylinders (industrial/commercial use, etc.): Gas cylinders are classified as "difficult-to-process items" and are not accepted in municipal household waste collection or at processing facilities. Consult the store where you purchased it or contact the Resource Circulation Promotion Division (located within the Clean Center) of the Kusatsu City Environment and Economy Department. Contact: 077-562-6361. 3) Important Precautions: Absolutely do not puncture, hammer, or strike the cylinder with a nail or hammer, as this poses a risk of explosion or fire. For any uncertainties, please confirm with the Resource Circulation Promotion Division.