Are Your Vents Clean?
Check the vents that pull air into your HVAC system. Are they dusty and collecting cobwebs? How about the ones that deliver heat and air conditioning into your space?
Remember, no matter how well you clean your vents, the material you see on the outside is present inside the ductwork.
Can you see inside the ductwork? If you can, you will understand how important it is to clean your system.