Reply to Ians question about return of solution.I have monitored it a couple of times by emptying back into the buckets.
I did a 40 ft by 15 lounge/ diner with a wool Carpet light beige
I was leaving behind about 5 litres out of every 40 I put in the ninja, this was running a 15 mtr hose from outside and using a powerbrush which does chuck the old solution out with a fury, i was very impressed with that.
Ran the blower over it and it was palm test dry mostly by the time I had done the hall about 30 minutes later. This carpet had a medium pile ( In my opinion).
On a nylon I appear to get better results especially the nice cheap short stuff
whizz overthat stuff
, but have not measured that acuratley yet.
I do make sure that i do 2 good slow dry passes on all areas as i am still a bit nervous about overwetting.
Hope that helps ,but it is hard to tell really, a lot depend s on the carpet you are doing i think ,wool loves the water it seems.
Going on training next wednesday at Alltec hopefully i will walk away a bit more confident.