Wash fireplaces with a 50/50 ratio of water and vinegar to remove the blackened soot on glass front doors. If the doors have a spring-loaded clip remove it, then take out the doors. Lay them flat on newspapers, spray with the vinegar/water solution and soak. Wipe it off with newspaper.
Big clean, small budget
Diluted white vinegar can help freshen many washable household surfaces. Always check the manufacturer’s care instructions first—and never use vinegar