Mate use to do nothing to at least 50% of his herd and was near the top of barbers chart, but he was very, very clean and you could eat your dinner of his cubicle mats,we're sealing everything as still have a inch of water appearing in the cubicle shedI often wonder if blanket teat sealant is worth it, our cows had 3 days of just hay pre dry off, last collection was 6 litres a cow, probably another 5-7 days of milking OAD and most would be all but dry. The less you do to a cows teat end the better, no matter how good your technique is at dry off there is always a risk of introducing infection. Cue the criticism....