Why the Smell? Mold & Mildew are Growing in Your Front Loading HE Washing Machine Plumbing!

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I purchased an expensive, high tech, high efficiency (HE) laundry washer and dryer set. I wanted to do what I could to help the environment. Water is going to get scarce.

After a few months I discovered the odor problem. The treatments that are usually recommended by the manufacturers (vinegar, baking soda or chlorine bleach) did not work well in my situation.

I started to investigate why a new, expensive washer had this kind of problem. I found that there seems to be an increase in odor when a lot of detergent and/or fabric softener is used. That makes sense. These are organic based materials and the film coating they provide is a good growth medium for the mold and mildew.

That's it!

The the film on the wetted surfaces of the machine provide a giant "Petri Dish" to grow things! Odor can come from mold, mildew, fungus or bacterial slime growth. Various kinds of "nasties' can be growing in the dead ends of the plumbing system.

I have heard of a case where a machine was used for years without problems. Then, it was moved to a new house with heated flooring and the odor bloomed. The "Petri dish" was put into an incubator! 

There will always be organic food for the nasties.

There will always be mold and mildew spores in the air.


The growth can not be kept out of the machine ...


So, it must be controlled in some way.

This is the same problem I had when I was the engineer responsible for keeping a bunch of water cooling systems from fouling.

Washers are a much smaller size with a different use pattern, but the general principles are still the same.


There are two means of controlling the growth.


1. Periodically destroy the cells of the organisms by using harsh chemicals and flush them out of the machine. Since the growth will always come back you need to time the period between shocks correctly.


2. Kill existing growth and then continuously control smells by contaminating the detergent film to so it will be difficult for the stuff to grow on it.  
 


I felt that I could come up with a laundry additive that would work with method #2 without damaging clothes, washers, plumbing or the environment.

It needed to be safe enough to be used regularly, but, effective enough to control the odor. I tried a number of materials and found a combination that worked well on my system.


Nu Fresh is the result!

Try Nu Fresh, it works.

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I have an idea about why these machines have this problem:

The testing that the machines went through was designed to see how long the parts of the machine would last.

The standard accelerated testing methodology would have run the machine cleaning cycles hour-after-hour, day-in and day-out until something broke.

They probably did not use detergent or softener since it would have not any effect on the failure of parts. This is a valid assumption since the materials used in the machine were designed to withstand any normal chemical attack. Realistically the most aggressive attack would be the effect of chlorine on the seals. Detergent and softener would not be a problem.

They never considered that a lower use level would have any other effects. They probably did not have any reason to add odor issues to the testing schedule since it never was a problem in the past.

The fact that the machine used detergent and softener so efficiently was intended but the secondary effect was not.

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The detergent makers did not have any inclination to worry about this either.

They specified (by marks on the cup) an amount that was sure to clean the clothes

The more you use, the more they sell.

They did not realize the unintended consequences of this since they only did accelerated tests similar to the kinds of tests the machines went through. Odor was not on the check list.

Old style machines used lots of water. Old style detergent was full of "builders" (powder) and "water" (liquid). Most of the active ingredients do not take up much space so there was a lot of fluff in the stuff. Everything ended up getting flushed down the drain and there were very few problems.

Super concentrated low sudsing versions changed this. When the detergent and softener now "wets-out" on the plumbing surfaces, apparently a significant amount of high concentration stuff stays on the surface even through the rinse cycles. After the rinse cycle, the machine is left with a wet, organic surface for stuff to grow on. (Nerds: This is a surface tension phenomena. The attraction of the thin film to the plumbing surface is greater than the ability of the rinse water to attract and lift it off.)
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The concentrated materials deposit on the interior walls. And, stay there even after the end of the wash cycle.

Low use of the machines resulted in time for things to grow on it --- resulting in odor issues.

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So, the closer you run your machine to the day-in and day-out cycle of the testing labs, the less problems you should have.

This is seen in the experience of the users of this type of washer.

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That's my story and I'm stickin to it !!!      Laughing





Nu Fresh, LLC * P.O.Box 272581* Fort Collins, CO * 80527
customerservice@NuFreshNow.com

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