Too Foamy, or, Flat
If temperatures are too warm it could cause your beer to pour overly foamy. Beer that is kept too cold can also result in a flat pour. Either way, it’s not a pleasant experience for your customers.
CO2 pressure that is too high can also be the culprit for an overly foamy beer. And, vice versa – too low and you have yourself a flat beer.
Cloudy or Sour Beer
If the beer appears cloudy or hazy (unintentionally) you may be due for a line cleaning or your glassware should be inspected for cleanliness. Dirty lines, obstructions in the beer hose, dirty faucets, hoses, keg couplers, and even dirty glass ware can cause all of the above mentioned issues. Also, double check your beer hasn’t expired!