I remember trying to clean and drain an abscesus from my mother's cat a couple of years ago..
all of this was homework given by the local vet... the friggin' cat wouldn't let me inject the iodine and I really used, sequentially:
numbers: 1, 4, 3, 6, 7, 3 again, and 8, when I finally made it.
the next day my hands were all band aids.
since that day on, I pay the vet on my mother's cat.