At all times, Adel got back to me shortly after any call or email. He came at a time of my convenience and worked for almost 4 hours cleaning our ducts thoroughly. Unfortunately, in one of the ceiling vents in the basement, I forgot that I had stuffed a t-shirt in an elbow out of view above a vent to prevent wasting heat on an area we do not much use. I emailed Adel after the fact and asked if that would be any potential problem. That evening he made another visit, free of charge, to put cameras and take pictures of all of the possible places that the shirt could have gone. All was clean, likely sucked out with his vacuum during the cleaning. I have absolute comfort that there is no problem and got to see all of ducts and the coils to be sure. It took him about an hour to do all this. He even apologized for the miscommunication when it was completely my omission!