This is carpet at a customers house couple in there 70's and they take great care of there home. But we have a problem of traffic areas that wont come clean looking at the carpet its not so much that its been matted down it just looks dirty. Cleaned it with Judson's O2 and not the best results decided to clean it again well put some Powerburst on it a little better also put some stain zone and I let them all dwell and I also forgot to mention that after the o2 i slow speed scrubbed. Any answers :?