I have a brand new (9 mos old) top load high efficiency washing machine. It recently began smelling like rotten eggs all the time. I tried running bleach, vinegar and Affresh through it. Interestingly, Affresh is made and marketed by Whirlpool, which is also the brand of washer it is. These attempts would improve the smell for just a couple of days and then it would return.
Since it is still under warranty, we had it serviced and the repairman said everything is working and it is draining properly. When he saw the we use 7th Generation detergent, he told us that was probably the reason. He said he has seen numerous households with the same problem who are using natural detergent. HE claimed that without the phosphates, the 'stuff' the washer leaves behind (human skin, etc) doesn't get cleaned away properly and remains and builds up and begins to stink.
WE are not sure we buy this. Anybody????