I found that after washing diapers, bibs, etc. for a while everything started to stink no matter how much I washed them. Now I clean out the washing machine every month or so and it seems to help tremendously. I fill it up with hot water (no clothes), then dump in some baking soda and vinegar. I let it sit for a few minutes (maybe 10 to 20) then let it go through the rest of the wash/rinse/spin cycle. There are other ways to do this, too -- I just looked it up online. Sometimes I will have to wash the stinky stuff a couple of times, but after the machine has been cleaned out things are better. Good luck.