For us girls who grew up being told to NEVER EVER wash your cast irons with soap...scrub your cast iron with coarse salt and a soft sponge. The salt is a natural abrasive and will absorb oil and lift away bits of food while preserving the pan's seasoning. Rinse away salt and wipe dry.
Fire glass produces more heat than real wood, and is also environmentally friendly. There is no smoke, it’s odorless and doesn’t produce ash. You are able to stay toasty warm without cutting down trees and the specially formulated glass crystals give off no toxic deposit.