Have you ever noticed mysterious yellow or brownish colored stains on your clothing? Sometimes these spots are caused by accidental contact with medicine or other chemical preparations. Over time the stains will oxidize and will become noticeable. Cold and other medicinal preparations, as well as antiseptics, dentistry, dietary supplements, and photographic chemicals are all to blame.
If you are aware of a spill, flush with water as soon as possible to prevent the residue from absorbing oxygen from the air. The oxidation causes the chemicals to become more apparent on a fabric and sometimes permanently set. If known, mark the areas of spillage right away, since after they dry you may not see them. The best chance of preventing permanent staining is early removal by a professional with special agents.