How to Clean Furnace and Air Conditioning Ducts at Home

While doing a deep dive, move every piece of furniture that isn’t nailed down Spring Cleaning I noticed several of the heating and central air conditioning ducts had a black soot like dirt or dust collecting around the register grill on the wall and ceiling.   I vacuumed them with the brush and hose on my vacuum sweeper and made a mental note that I need to add this task to my deep cleaning  checklist.

A few days later it was back.

So. Gross.

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Why do I have Black Stuff Around my HVAC Registers?