[John Kelly]

There are 2 schools of thought about carpet cleaning technique. Which one you follow is usually down to who trained you.
One technique is to use a pre-spray on the carpet. This allows the pre-spray to dissolve the dirt during the dwell time which is then rinsed out with plain water, an acid rinse or another detergent. Regardless of what equipment you are using there will be product left in the carpet.
The other method is to add a detergent to the tank of a portable. In conjunction with a pre-spray or not the carpet is then cleaned by injecting and extracting the said product through the wand. Again product will be left in the carpet.
Both systems work.
Carpet cleaning products are designed for this and very few leave residues which will be detrimental to the carpet. The problems begin when operators use either too much product or under powered equipment.

[Gary Webber]

John,

I agree with you, something will always be left behind in the carpet due to recovery rates of all equipment. My concern is that someone who is cleaning with a traffic lane cleaner of Ph10 and then a detergent of Ph10 in a wool carpet , will leave it in an adverse way.

I have used a series of pre-sprays and agitate ahead of me for the last 12+ years and have never had a problem in getting the right result. The answer is to use a better grade of traffic lane and rinse and the right dilution.

Gary

[Darren O]

Gary you keep bringing wool carpets into it this started of with you saying you shouldnt be putting chemicals into your machine as it blocks the solution hoses and clogs valves i use liquid detergents and ive not came across any of these problems also on most domestic jobs i use one clean on wool but theres times like this week when i cleaned a pub with blacktop and i rinsed with F90 and considering the state the carpet was in it haddnt been cleaned in 6 years so i dont think using F90 will do it any more damage than whats already been done.

[Gary Webber]

Darren,

The wool carpet was an example.

You havent got it mate, I'm leaving it there you carry on doing what you are doing!

Gary