Thanks for the reply. I tried that as soon as it happened but the red staining has remained. There does not seem to be any dust left, just the stain. This has never been a problem before as it normally comes up with a vacuum cleaner, the carpet is only a couple of days old and the dust slipped by the dust sheet.
Ignore the instructions on the side of the can, and soak the affected area with this spray, then make sure you have a wet and dry vacuum, NOT A NORMAL VACUUM CLEANER, it HAS to be a wet and dry.
Let it soak in for a couple of minutes, then vacuum up, you may have to do this several times.
The cans of spray cost about £5.00.
It has worked for me on several occasions, best of luck.
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