Ooze Resolution Gel Glass Cleaner is engineered to give your glass the best clean on the market. The natural, non-toxic formula easily removes resin and tar from glass or metal piece! Each 240mL pouch contains a green, reusable gel cleaner that can be used in two ways. Unscrew the cap, pour some solution into the piece, cover the holes, and give it a shake. You can also cut the top of the resealable pouch open, insert a small piece, zip it up and shake it around. Let it sit for a few minutes, and then rinse with warm water.