Slightly Sour Aftertaste

[pacebrew]

Ok, I could be going crazy. I made a 6.5% ABV peat smoked scottish ale.

Its about 1.5 months old, i dont have much left and the rest of what i have has bee sititing in a keg for most of this time.

My question is, the smokey taste that it had when i initially tasted it has died down, and whats left is a very, very ,slight hint of sour at the end of tasting. Its no unpleasant just odd. Its towards the end of the swallow.

I dont think this beer is infected, as i have been drinking it out of the keg for a while now, and this is the first time i noticed this taste.

What do you guys think? Maybe time to clean the plumbing?

 

[samc]

What's the recipe? Could have been there all the time but the smoke covered it.

My wife complains of sourness on many beers, usually Lagers.

 

[pacebrew]

its hard to describe, almost tastes like carbonated water. im wondering if its overcarbonated.

 

[pacebrew]

mostly pale 2 row, 1% peat malt, mash temp 155, very little hops, cal ale yeast cake that we had sitting around