Yellowing occasionally appears after professional cleaning of light colored carpeting, rugs, upholstery, draperies or other textile furnishings. This discoloration occurs for a variety of reasons, and is usually indicative of another pre-existing problem. The yellowing is generally not noticeable until after the item is cleaned, either because the dirt is 'hiding' it or some latent is catalyzed by customary cleaning. This is not the fault of the cleaning process. The customer is often disappointed that the interior furnishing is clean, but did not return to its 'new condition.' Occasionally, the yellowing will be in one area but not another, such as under furniture or in front of a window, where some other condition has initiated the yellowing only to be exposed by the cleaning method.
Common Reasons for Yellowing are...
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