Chlorine Bleach Treatment Directions:
Add 1 to 2 cups of liquid bleach to directly to the tub without any laundry in the tub. Run the longest, hottest cycle available on your machine.
Chlorine acts by burning the cell walls of the bacteria, mold or mildew. The cells rupture and they die. This method only affects the very top surface of the mold or mildew buildup. It must be repeated as needed. It requires an extra, large, hot and empty load. A waste of time and money.
While this method can be effective in killing the organisms it also attacks the seals and gaskets of the machine. The amount needed to control the growth is much more than the amount needed to brighten laundry. So, the machines are not designed to handle too much of this type of shock. See the Shocking Spiders Page for details. Chlorine causes some of this type of damage when using this type of shock treatment
This is similar to the chlorine shock treatment used on swimming pools. Sometimes the water clears up but the walls can still be slippery. The machine seems clean but the smell comes back fast.
Chlorine will not help remove the residue on the plumbing. It only kills the nasties on the surface. The food (residue) is still there for the next time. The effect only lasts a few days. It could work if you if you do a lot of laundry and only have a minimal problem. However, we advise against using chlorine shocks to minimize damage to the machine. It just doesn't work well enough to justify the damage.