This is always a catch 22 scenario.
You have discovered an old thilthy carpet amongst your family belongings. It may be worth cleaning but you would not know whether it can be restored unless you got it cleaned. Cleaned enough anyway to see if the carpet had structural damage perhaps or stains that are irreversible. PCS understands that dilemma and offers a fair approach to carpet diagnosis that will share some of this risk to ensure customer satisfaction while saving some great carpets that would otherwise have been destroyed. Great approach PCS!