We had our air ducts & vents cleaned by Air Care two months ago. But the weather has been so nice we haven't touched the AC until this week. Vegas is hot & we've lived in this house for 4 years. We live near new construction so there is always dust and dirt in the air. It doesn't help that my furniture is dark neither. But there has been more dust than usual, we even change our filters every 3 months! But after Air Care came out, on time & now we can definitely tell the difference! They took about 6 hours but was very thorough with the cleaning. Went into my attic, cleaned every vent & even did my dryer vent. We noticed not as much dust & they were very professional. They also wear shoe protection every time they come in & out of your house to protect your floors. We had one tech but he did an amazing job and I highly recommend them! They are on the pricier side but you get what you pay for!