A BIG THANK YOU to paul 2, I have just check out the cleantalk posting form April last year and that is actually the same problem as this rug has. The fault lies with the manufactures and not with the cc, although their service could do with improving. I will re-clean rug and towel dry to improve lines, and may even download the photo and posts to show the client. It may not cure her rug but at least it will put her mind at rest.
Once again Paul 2, thanks.