Ah, internet. It gives you the most useful information. We've had our bathroom towels for a while now, and they had started to get "the funk". Washed in hot water with detergent and dried with dryer sheets? No effect. They still had a damp, icky smell to them. The solution?
I'm pretty convinced that vinegar and baking soda can do just about anything. I already use a 50/50 water vinegar spray to do the majority of surface cleaning in our apartment, and now I have yet another reason to love vinegar. All I do is throw in 1 cup with the wash, and the towels are perfect!
What interesting fix have you found from the internet?