white skim on top of batch

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New Member
Feb 7, 2008
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sometimes when i am fermenting my ales, i get a white skim on the top of the beer. it almost resembles a waxy coating. does anyone know what this is and how to prevent it. yes, the airlock is installed properly, and the lid is secure. HELP!!!
Your yeast is having a party. It's doing just what it's suppose to do so you don't want to prevent it. No one ever said that fermentation was pretty! :tank:
i had this happen once and i thought it was an infection. i went ahead and bottled it and found that most bottles had the same film at the bottle neck. two weeks later, it had settled out and the beer tasted great. i don't know what it was, maybe yeast residue of some sort, but it went away and the beer turned out fine.