[capital_cleaning]

Hi guys can anyone give me any advice. Just taken over a periodic carpet cleaning contract. Started to clean an  area using a wet extraction machine with prochems extraction pro. Everything seemed to be going well. The next day we received a phone call from the client saying that strange dark marks had appeared  on there pink coloured carpet in certain places ( heavy traffic areas) on the carpet. After meeting with the client to inspect the carpet, it was bought to my attention that the carpet had always previously been cleaned using a dry powder system! That night we bonnett buffed the whole area again using prochems oxibrite & fibrebuff chemicals, the rest of the carpet has come up well, but the other marks are still there. Any help would be much appreciated.  

[Dynafoam]

Since the carpet has previously only been cleaned by what is realistically a maintenance there was, in all probability high degree of impacted soil at pile-base.

You have cleaned by a deep-clean method but it sounds like the clean was less efficient than was required and that some of the soil not removed has wicked to the surface during drying.

Bonnet buffing with a bleaching agent will not solve the problem, what is required is a though extraction clean without missing out any of the steps : pre-vacuum, pre-spray, agitate well, extract with good flushing and leaving the carpet as dry as possible.

If you have only low-power equipment it may be worth post-bonneting to lessen the risk of further up-wicking.

There is a small chance that the dirty patches were partly protected from your bleaching and may be a slightly darker colour after cleaning.

John.

[capital_cleaning]

Thanks for the advice, let's hope this sorts the problem out  

[buyhostmachines]

Try Host Spot remover and blot with white towel.  Follow up by using Host Dry Extraction Carpet Cleaning Sponges Compound.  You can use a special designed brush and then let sit for 15 minutes, then vacuum up and hopefully that will take care of your spot problem.  So spots depending on the nature of the spot will be permanent.  Ie., Coffee if it is scalding hot when spilled and not blotted up immediately will act like when a carpet is being dyed.  When a conventionally dyed carpet is dyed, it is dyed in a heat bath of usually over 180 degrees.  The heat opens up the dye-slots and the color is drawn into the core of the fiber to form a permanent bond.

I hope this explains why sometimes you can remove coffee and sometimes you can't.  Also on the times that coffee isn't really super hot and it dries, you can use 50% White Vinegar and 50% Water sprayed on and then blotted up with a white cotton towel.  The same thing holds true with tea.  You need to have a neutral PH in almost all cleaning instances for a variety of reasons.

[howgood]

Hi.. You didn't say what the the carpet was made of.. sounds like jute browning or possibly 'wicking' you say you used all Prochem materials so best you speak with them asap.