Related Clues:

• Trash collection?
• Two scents?
• Memory triggers, sometimes
• Noble gases lack them
• Memory triggers, at times
• Some powerful evokers of memories
• Foul scents
• Secret targets
• Targets of extractor fans
• Durian stall smells
• Lingering scents
• What Diaper Genie filters trap
• Baking soda absorbs them