• Cleans and restores wood heater glass windows and doors • Removes soot, tar, and creosote with ease • Reduces build-up of stains • Streak-free formula • Non-hazardous formula • Easy and safe to use Crystal Clear Fire Glass Cleaner restores the crystal-clear look to wood heater windows/ doors and makes light work of stubborn soot, tar, and creosote that accumulates on wood heater glass. With continued use, Crystal Clear Fire Glass Cleaner will reduce the build-up of stains, making wood heaters easier to maintain. The non-hazardous formula is quick and safe to use.