Have you noticed the following: your carpet was almost spotless along the skirting boards as opposed to the heavily soiled traffic area. The carpet cleaner came round and gave it a good vacuuming, pre-spraying and extraction.
Suddenly, you noticed (horrified) a long black mark along the edges of the freshly cleaned carpet. ‘This stain wasn’t there. You made it’, you quickly blame the poor carpet cleaner who had just finished his work.
Let me explain something: the carpet cleaner has no fault whatsoever. The black stuff that you see is coming from under the carpet when sucked with the powerful vacuum motors of the carpet cleaning machine. Unfortunately there has been dirt under the carpet that is resurfacing now and the only way to resolve the problem is to remove the carpet, clean well and fit it back.
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