Common trouble spots Cows Mud and manure on the skin of the udder. Clip hair from the udder regularly to reduce the presence of dirt and moisture during milking. Milking wet udders and teats. Bacteria Environmental bacteria growth, especially on in-line filters, during milkings longer than 4 hours. Bacteria from mastitis-infected cows.
Cows can shed bacteria into milk without showing clinical mastitis.
Equipment Dead ends and sharp corners in pipelines can reduce cleaning action. Check for them. Incorrectly placed and sized air injectors. An undersized CIP wash line to milking units. Environmental bacteria growth, especially on in-line filters, during milkings lasting longer than 4 hours.