I've got this problem for ages. Usually DH's clothes or sheets or towels would smell fresh and nice after washing. Then I fold them and put them away or hang them in closet. If he doesn't use them for a while (say a few weeks), these thing start to smell off. The longer they sit there the worse they smell until they contaminate whatever was next to them as well. The kids's clothes or mine don't ever have this problem. Thank goodness he has his own closet.
We've always been using front loader, either Tide HE, Ecos HE or Nellie's laundry soda. I'm guessing these stuff simply didn't get 100% clean. We have high humidity here and what's left eventually feed bacteria? He works an office job and hardly does any yardwork or exercise, you'd think washing his shirts once would be enough. Can anyone suggest a good way to make his clothes clean in one wash cycle? Washing soda? Oxyclean? Hot water (not all the fabric can use that, though)? We do have a cloth diapers cycle on our machine that probably would kill everything, but it takes 2 1/2 hours. I'd rather not use that much energy if some laundry additive can fix that.