Do a wash load with a cup or even two of baking soda. If that doesn't work, try vinegar, a cup or two, in the rinse. If that isn't working, mix up a more concentrated solution of one or the other (don't mix them - if you do, you have salt water!) and try soaking them. Neither of these will affect the color.
If these items are white you can try bleach or ammonia. Again, not together. Both bleach and ammonia can fade out the color, so you want to use this as a last resort.
I also agree that hanging them out in the sun is a very good idea. Doesn't hurt them to get rained on either - sometimes freshens them up.
Hanging them out on the line for a day or so might help. The sun will kill the mildew and the fresh air would do them good.
Hanging them out on the line for a day or so might help. The sun will kill the mildew and the fresh air would do them good.
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