Ty assessed our ducts and advised against duct cleaning as it would disturb the fiberglass lining. He offered an alternate approach - the iWave-R residential air cleaner to filter out dust, bacteria, odors, mold, smoke, allergens and air particles. We went with this idea. Ty installed the unit this date, 1-18-22 with a minimum of fuss. Anticipate less sneezing on my part. Fingers crossed!