Maybe oils from your lips/skin killing the head in certain spots but not others?
Someone in another forum suggested oils or fatty acids. I don't know where those come from, but I always rinse my glassware before pouring a beer.
I don't think the flavor is affected on this beer, but it's ugly and weird looking. And it only seems to happen on my light lagers.
Does it look like this when you pour or only after a few sips? I'd still wager it's oils from your lips/skin. I assume your light lagers use adjunct which will result in weaker head retention unless you've added in something like carapils to compensate.
Oh man, I really thought that was a joke! Sorry, I guess there's just something wrong with me because I definitely saw a swastika in the foam. I feel feel like a huge a-hole now... Disregard everything I've said, and hurl insults at me if you want...
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