A few months ago I replaced our aging set of Maytag Neptune washer & dryer with a GE set. When we were first looking at the new set I asked the appliance dealer about the washer cleaning cycle. He said you run it every couple months, it basically fills the washer with more water than normal and cleans the seals, etc. You also add a special type of cleaner prior to the cycle...this is supposed to prevent/correct the musty smell that so many people report with front load washers.
Our old Maytag would start to smell musty once in a great while, but a hot cycle with bleach or simply leaving the door cracked open took care of it. I expected the same sort of think with the new unit. Much to my dismay, our new (and huge) washing machine began to stink after about two weeks. Not just a little, it was RANK. Before anyone asks, I don't wash cloth diapers or anything like that and our water supply is filtered/softened/odor free. I bought the special washer cleaning stuff for a few bucks, ran the cleaning cycle, and it did not stink afterwards. Great! oh wait...2 weeks later it smelled even worse than before. Leaving the door on the washer open helped, but it also made the entire laundry room smell funky. We do most loads with warm water, so I was at a loss about the smell.
I told a friend about it (who happens to run a cleaning service) and she matter-of-factly told me to switch to powdered detergent. She said it rinses cleaner, and is simply a better product. I had witnessed the gummy residue that can build up in the detergent dispenser, so I decided to give it a try. I picked up a box of powdered Tide and started using it. It has been about a month and the washer smells like new. Clothes are clean, smell good, wife is happy.
Just thought I would tell our story in case it helps one of you guys.