Carpet cleaning is a recent add on to our business and so I am still very much in the learning stage.
I am writing to request advice / opinions on unusual (in my limited experience) staining that I encountered earlier today.
I have already cleaned this carpet and I thought the marks had gone but after looking at some pictures taken afterwards I am not so sure.
The customer is a friend and was not charged for the job but for my own peace of mind I need to know.
The marks appeared to be grey almost metallic in appearance. I did ask if the underlay was as new as the carpet as I have heard about old underlay wicking up through newer carpet but the underlay is the same age as the carpet (three years or so). The carpet is synthetic (polyprop as far as I could tell, burn test results and it floats).
The worst of the marks were in high traffic areas, doorway and in front of settees, but too spotlike in appearance to be that simple (again in my opinion).
I asked about foot creams and spillages was told no to both.
If anyone can advise on what the stains are and how to approach for future reference I would be most grateful.
p.s. just to add that I vacuumed thoroughly, pre-tested prespay, presprayed with Prochem Multi Pro at 1:4, agitated, more so in the affected areas and then extracted with Prochem Fibre and Fabric Rinse (1:20) in the tank. On site all loked well but pictures left me in doubt.
p.p.s. the two pictures added are taken before the clean. They just about show the staining.