Troubleshooting Milk froth escapes under the lid of my milk frother It can happen that milk froth escape out of the milk frother. You can often easily fix this yourself. The milk jug is filled beyond the MAX indication Make sure you do not put too much milk in the milk jug. There is a MAX indication inside the milk jug. Do not fill the jug beyond this indication. A milk type that is not suitable for frothing has been used Use chilled semi-skimmed cow's milk for the best frothing result. Note: Occasionally a brand of milk may not froth well or too much. In that case put less milk in the jug or try another brand.