I was able to get the single bottle version of this product for about $20 online. I had this a while back but never really got to use this as a single application for fighting the mold or mildew problem in my washer. After using the rest of the liquid detergent, my odors came back and I finally got to use this product for the first time.
So I started off with the hot water wash. My water temp was set for 140 degrees on my water heater. I added a couple caps to the wash. Directions mentioned that I only needed one but figured two might be better than one. I ran the wash for a couple minutes and stopped it. I added more hot water until about a third of the washer was filled. I ran the washer for a few more minutes then shut it off and soaked overnite. In the morning I started the washer again. After the wash finished, I poked my head into the washer and smelled a faint odor. I have no idea what my washer smelled like when it was new but the mold and mildew odor was gone and it had this neutral smell.
So for the most part, I'm really happy with this product. I'll have to see if the problem will come back or will persist like it has before but for the time being, I'm a happy camper.