I don't know how many of y'all get this, but I feel like I'm especially susceptible to it. It seems more prominent with IPAs. I have a nice one on tap with Nelson Sauvin, Mosaic, and Citra, it's nice and fruity. The first half of the pint smells and tastes great but after a bit, I start to not be able to taste or smell those nice hops. Or I start second guessing whether the beer tastes how it should or not. Does anyone else ever go through this? It's driving me mad!
I had a co2 gas line contamination issue a while back where I found mold in one of my disconnects and white flecks of stuff in my gas lines. This was causing hoppy beers to turn to Werther's Ale. I disassembled everything, cleaned and hung dried, and haven't had issues since. But I'm traumatized from 2 years of ruined IPAs. There's no reason the beer should be going south. The system should be clean.
So, having said that, I think I have palate fatigue. Sometimes all I taste is the bitterness of the hops and can't really smell or taste them. It happens and probably means I should just not drink IPA everyday. Your palate is really affected by the setting you're in, your expectations of the beer, the mood you're in, etc. I feel like I'm crazy for thinking all this. Does anyone else experience this?