It's my first homebrew. I'm brewing an Amber Ale. When I racked the beer from the primary bucket to the secondary carboy, I took a sample and it tasted good (I could taste the flavors of the grains.) However, at the time of bottling, I took a sample of the beer after priming in the carboy (and waiting for half an hour) and tasted it only to discover that it lost its flavors and tastes watery.
I had racked the beer after 7 days from the primary bucket to the secondary carboy by attaching a sanitized tube to the spigot and putting the other end into the carboy. I followed the instructions to prime it and bottle it after 10-14 days (I waited 13 days).
I'm quite surprised to have discovered the loss of flavors. I was wondering if something went wrong when I racked to the secondary. Perhaps oxygen was introduced or bacteria? Or could the dextrose-water mix I added made it lose its flavors? I read that bacteria causes a sour flavor and oxidation results in a wet cardboard flavor, neither of which is my case. And the dextrose solution was only 1 cup with 4.5 oz of dextrose. What could cause the loss of flavors?
I'm a newbie so I did mess up a few things. First, I didn't take the gravity readings. I just followed the instructions for the times specified for how long to ferment, when to rack, etc. The instructions didn't mention gravity readings.
Second, I misread the instructions of the sanitizer (Io-Star) and I rinsed my equipment with hot tap water after sanitizing. I also used hot tap water for the sanitizing solution instead of lukewarm/cold water. Well, this is a lesson learned for next time, but I hope this not going to ruin my first batch. At least, now I know that next time I can do better.