Once the teat has been dried, do not touch it again with your hands. Timing is very important to milking speed and milk yield. Recent research done in Denmark has shown the importance of timing. Ideally, the units should be attached to the teats 45 to 90 seconds after stripping. If the timing is delayed, there will be longer milking times and less milk harvested.
Many farms have inadequate timing which creates over milking before milk let down.
Often times parlor farms set their automation on manual until let down occurs. This is not acceptable and the solution is better timing. In parlors, I usually have the farmers work in groups of three or four cows. This helps to optimize timing and maximize cow throughput. The more cows per hour one can get through the parlor, the happier everyone will be.