Every word is 100% factual:
Excel Air arrived @ my place today at 914am for a scheduled appointment for air Duct cleaning and a free dryer vent cleaning service. By 920am the tech was in my house saying I have a mold problem. The problem is, he used a product called "10 Minute Mold Test. Com" to swab 2 vents in my house. The product is a pen looking item that is made by 3M and is used for testing on FOOD production equipment, to see if the item has been cleaned properly. I Googled the name to do some research.. and the link below is what I discovered.. Shocking
http://necal.bbb.org/article/year-long-bbb-investigation-yields-troubling-findings-in-the-air-conditioning-duct-cleaning-industry-20998
Research it yourself. The tech said he needed to call to get authorization to charge me $349 for a total cleaning of my duct work. He packed up his gear and left. I wasn't charged the $49 for the service, but again they didn't do any work.
Consumers need to be made aware of practices like those employed here. If someone says you have a mold problem and you can't see it. Have a 2nd opinion and call someone else. Those "10 minute Mold Test.com" swab items can only be verified if it is sent into a lab to be properly tested for mold.