You may not notice this, however, because it can happen very gradually over moments.
Bleach, hair dye, drain cleaner, some insecticides and certain other household items will seemingly cause permanent color changes in the carpet that cannot reversed with any cleaning methods. http://Www.missionmedvet.com/__media__/js/netsoltrademark.php?d=tigaedu.com%2Fblog%2Findex.php%3Fentryid%3D423350