your already making in-ways. The singing is done using a purpose build singe gun,
something I acquired whilst in Australia, but I am sure they are readily
available over here too? I use it during milking, and it's attached to a small
gas cylinder that fits neatly into my apron pocket!
It is never
a pleasant milking when it's done for all the obvious reasons, primarily the
cleaning up afterwards! but would be well worth pursuing in my opinion, I did
them all as a whole herd, and now do it again as they calve in or, I do
sometimes have to give the odd one or two a mid lactation singe, just to keep
them neat/clean and tidy.