Our carpets (two bedrooms, in which shoes are generally not worn) look pretty much identical to before their cleaning. We've wondered whether the "dirty" areas that didn't get clean are actually wear of the fibers, rather than dirt/stain. But, the carpets are less than three years old, and no one wears shoes when they walk on them. So, it would be odd if that were the case. If it is dirt, then the Coit cleaning did nothing to remove it.
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