I do not recommend Lintblasters. Robert and Chris didn't do what we paid them to do, and wouldn't come back to make it right or give us a refund. Also, Robert texted me three screens of rants after I explicitly asked him not to contact me again. TL;DR below.
They spent about thirty minutes at our house. Robert worked in the house, while Chris went on the roof to clear the dryer vent from the top down. At one point, Robert thought one of the vents was crushed at a joint, as one of guys was having problems getting their brushes through. Robert went in the attic, found two pieces of pipe that he said were "disconnected" and taped the joint. He told me that the dryer would dry a lot quicker now and they left. Subsequently, our dryer took over twice as long to dry a load.
My husband pulled the dryer out from the wall to make sure the flexible hose to the wall wasn't crushed and then I called Robert while my husband kept investigating. When I told Robert our dryer was working worse than before he got super defensive. He claimed he told me a bunch of things that he hadn't, so I sent him some pictures from behind the wall. He agreed to come back, but then backed out, claiming we had a severe builder's defect because the pipe doesn't come all the way down inside the wall to connect to the dryer. (It only extends through the ceiling.) My husband removed the tape between the two pieces in the attic and ceiling and they were completely full of lint. I texted him a picture of one of the lint-filled pipes, asked for a refund, and to not contact me otherwise. This is when I got the three screens of ranty response. We think Chris cleaned out the furnace pipe by mistake, but who knows? My husband took the pipes into the garage and cleaned them out himself.
I advise you to not trust these guys the way I did. read more