Wool is a wonderful material but it definitely requires a gentle touch and the right pH balance. I have a large wool rug and a matching armchair, and I was so scared of ruining them with a rental machine. I decided to go with Chicago Couch Cleaning https://chicago-couchcleaning.com/ because they use eco-friendly, green-certified products that are safe for natural fibers. They managed to clean the wool thoroughly without over-saturating the material, so it dried quickly and didn't smell weird at all. If you are searching for professional upholstery cleaning services in Chicago that understand specialty fabrics, they are top-tier. My sofa feels so much softer now and the colors look much brighter than before. It is definitely better to let experts handle wool so you don't risk any permanent damage or shrinking!