I did a call back today from a job I did on monday! It was an empty rental were the tenants had done a runner, it was covered in stains.
They called me back as they were unhappy with the amount of stains remaining
They said if it could'nt Be cleaned any better they would replace it, so gave me permission to do what ever.
I mixed a peroxide, ammonia &. distilled water at 1-1-2 and attacked all the stains with that mix and an iron.
every stain was improved with some totally disappearing. The carpets were a plain wool mix. some areas did show slight lightening but not really bad.