I use "OdoBan" in my final rinse. It makes towels, (and all my laundry) smell fresh wonderful. For stubborn musty odors in clothing, I turn off the washer, and let the final rinse soak for thirty minutes or so.
It is inexpensive ($10 for a full gallon jug plus a 24 oz refillable spray bottle). It has too many uses to mention. It is not a masking agent. It eliminates all odors and kills 99.99% of germs. With six dogs, I wouldn't be without it.
By Erika from Tallahassee, FL
Tracking down the cause of a stinky metallic smell in bath towels fresh from the wash can be a bit of a mystery. Possible causes can be your plumbing, water supply, or even the water heater. Persistence and a process of elimination my be required.