Once you've unscrewed the valve, take the tank - which still contains propane and methyl mercaptan residue - immediately out back and fill it with water and dish soap. Leave it overnight, then dump it and rinse and drain it dry. IMG_7960 Technical Details Camera: iPhone 5 Taken: May 14, 2016 Focal length: 4mm Aperture: f/2 Exposure: 1/3,195 second ISO: 50
