Hi Shaun,
Black top pub carpet spells 2 handed work at my age, so again out comes me rotary.Gives my helper something to do instead of watching me sweat buckets. Besides you can't beat a good scrub on black top carpet, thats what pre-spray is all about ( scrub and dwell).
Hey, this could be my new catch phrase,
Joking appart there is no substitute for agitation or dwell time when cleaning really filthy carpets. Heat plays a large part in any cleaning process but will never work as well as the right chemical used correctly.
If your tackling this type of work single handed power heads will lighten the work load but it still needs a certain amount of scrub & dwell before you can begin to extract.
Remember Scrub & Dwell it makes more sense, daft as it may sound you use far less water rinsing when you have carried out the first process corectly and the carpets do dry far quicker.
Here's test sadly only 50% of you can carry out.
Leave your hair for 3 day's without washing it ( if you dare) and go out in the rain, now dry it with a towel and see how long it take to dry thoroughly. Then wash your hair with shampoo and do the same, you will find it dry's far quicker because there is no dirt or grease left in it. Carpet is exactly the same its not the water in the carpet that takes longer to dry, its the dirt and grease left behind that takes longer.
Need I have to say it again SCRUB & DWELL!