Lion heart,
This is very basically how i get great results with microsplitters( in my case solutions 2 & 4 )
1, Pre Vac, i use a twin motor nilfisk upright
2, Sparingly apply pre spray, at a ratio of 12-1 up too 20-1( i use hot water)over application can wash surface soiling to plie base.
3, aggitate north to south then east to west using sebo duo or similar(rotary on some commercial)
4,Fresh water extract at 60 degrees
5, Set pile
I have found microsplitters work very well with charlie pads, this technique is fantastic for commercial maintenance work, i clean a local snooker and bowling club every two months with charlie pads, this carpet gets really abused but comes up a treat with minimal fuss and dry in no time.
Paul