When I pour my homebrew, I get a nice head of foam, approx. 1/2 inch, but there is always a few bottles out of the batch that when poured, produce massive amounts of foam. In these bottles, I would say up to 50 percent of the glass ends up filling with beer foam. So far, I haven' noticed any difference in flavor between the two.
Anyone have any suggestions as to why this happens?? Has anyone else had this happen?
My theories are contamination, or for some strange reason there are different concentrations of yeast and sugar in some bottles that produce more carbonation.