Skin Irritation and Rashes
Berber carpets made from any material besides nylon and wool are impervious to color loss when using bleach. The stain is removed, but the bleach sits in the carpet; you can't rinse it out with water. Use ann "anti-clor" chemical to properly neutralize the bleach. The carpet will dry where the chlorine bleach was used, but it leaves behind a residue. The residue can cause skin irritations and rashes on both animals and humans.
High pH Balance
The Berber weave traps the bleach in the carpet backing and in the bottom of the weave to create a high pH balance in that area. The high pH balance creates a type of magnet that attracts dirt and soil. Stains reappear easier in the area that was cleaned with the bleach.
Dried bleach is somewhat dormant, but even a small amount of humidity will reactivate the bleaching chemicals. Bleach is a health hazard; using it on Berber carpet provides an area where bleach can continually cause irritation to the people or animals that touch the spot.