The Virtual Beer Technician offering homebrew troubleshooting and repair advice!
Cause:A winey, wet cardboard, papery, rotten vegetable/pineapple, sherry or baby diaper type of aroma or flavor is a sign of an oxidized, stale or old beer. Over time the symptoms get worse. Any oxygen that is introduced in the brewing process will eventually show up. Temperature accelerates the process of oxidation.
Corrective Action:It is very important to keep oxygen to a minimum in all stages of the brewing process (except when pitching yeast). Store your beer cold to slow down the effects of oxygen introduction.
E-mail mike[AT]mrgoodbeer.com or check out the FAQ if your problem is not listed here.
Thank you for visiting MrGoodbeer.com for Home Brew Help, Homebrew Help, Homebrewing Help. We hope we helped you solve your Homebrew Problem, Home Brew Problem, Homebrewing Problem.
Be responsible, don't drink and drive!