I recently tried MC3 machine clean in my high end Whirlpool washer because it had a nasty moldy smell. I tried the initial treatment process as recommended on the package and it worked great. The smell was completely gone and there was actually a nice aroma inside the machine when I was done. I use Lemi Shine in our dishwasher as well as we live at 8,000ft. and have a well that has a high calcium content. We couldn't live without Lemi Shine products. Thanks....