MYO: Fireplace Soot Remover

Fireplace Soot Remover

1 bucket warm water
1/2 cup washing soda (look in the laundry aisle of grocery store)

Wash surface, wearing gloves; then rinse.

For really tough jobs, make a thick washing soda paste by mixing it
with water, and then spread the paste on the soot. Keep the paste
damp by spraying every hour or so with a spray bottle. Leave the
paste on overnight, and then rinse. Make certain to only use this
formula on inert surfaces such as glass and stone, as this amount
of washing soda can peel off paint, wax, etc.