07-08-2014, 02:02 PM
If I understand your question correctly, you were possibly seeing some fiber pulled away/out of the carpet as you cleaned. In my experience, this is not totally uncommon, based on a multitude of factors. If you were properly lubricated, and kept the 'Bot moving, I would not worry so much about seeing some loose fibers. If I get loose fibers in the normal cleaning process, I just do a quick post vac and move along.
Ed Elliott