This is a common mistake made by beer makers and can easily be avoided.
- The beer had not fermented sufficiently when it was bottled. Always check with a hydrometer to make sure the correct gravity has been achieved before bottling. You will need to release the caps on the bottles to
relieve excess pressure.
- Too much sugar was added to prime the beer. Add no more than 1/2 teaspoon of sugar per pint of beer. You will need to open all the bottles to release the gas.
- The beer has been stored at too high high a temperature. Move the beer to a cooler place (10-13C).