Thus, it is important to check the milk with a strip cup or strip plate imbedded in the floor of the parlor for abnormal milk. Cows with abnormal milk should be segregated and evaluated for treatment and their milk withheld from the milk supply. Examine all milk contact surfaces when dry for evidence of deposit. A bluish or rainbow appearance on metal surfaces indicates protein buildup. An off-color white or yellowish appearance is an indication of mineral deposit.
Chlorinated cleaners remove protein while acid cleaners remove milkstone.
The use of an acidified final rinse aids in preventing waterstone deposits. This should be based upon a water hardness test and give specific materials, amounts of water and cleaner,circulation times, and temperatures to use.