It’s difficult enough to locate matching socks first thing in the morning, much alone troubleshoot a bad cup of coffee. Some issues need more than a re-brew, although many can. Here’s a brief guide to recognizing and fixing common coffee flaws. While these suggestions apply to most filter brewing techniques, they do presume you’re beginning with excellent quality water (filtered, not distilled) and uniformly ground coffee. Sour Taste Under extraction Sour coffee hasn’t had enough time to extract, resulting in not only “weak” but also sour flavor. If the coffee you’re drinking lacks natural sweetness, full mouthful, and a well-rounded…