Related Clues:

• Santa's laundry problem
• Flue blackener
• Flue dirt
• Chimney residue
• Pipe residue
• Flue filth
• Carbon buildup
• Sweep's schmutz
• Symbol of blackness
• Chimney coat
• Flue coat
• Hearth dust
• Chimney coating
• Chimney sweep's collection
• Flue stuff