gwrightson , not been cleaned for 6-7 years but thats only what mgr said as she had never seen or herd it had been cleaned since she worked there: they hoovered with a HENRY so after my pre-vac i took half a carrier bag of loose soil ( TESCO ) .
Colin,pre-spray 1:100 ish !? Pile lifter to ag then 15 mins ish - at the last bit my machine became empty so just filled with cold water and got the same result.
Been back today to check and it looks great , even given £40 in Vouchers as a bonus and looking at her other shops on wed

Another job today at a rental prop: in a bad way, marks all over bedroom ( polyprop )
split the job in half . used my old stuff one half ( lots of passes to get it right )
Using MP (same method as 1st time= same result) . Stairs Landing (80/20) Drink spills on stairs (blackcurrent/Larger) same method as 1st time and same result. rebooked LL for next 3 years but thats nowt new cause most my custys are now in CP with me.
School 3 Classrooms and corridor tomor so could be the chance to try 3 mothods to see if it really is MP or just carpet not as bad as it looks but I doubt it .
R.T