i would suggest a mens razor or a razor with multiple rows, shave side to side instead of up and down to avoid ingrown hair and use a little exfolating brush on your skin not around your actual cat and when shaving around the opening push the lips to be able to get a good shave this is where you can shave against the growth
with a razor
use a machine and shave smoothley.
Nair.
Shave regularly as two time in a day. .and very softly
Shave your head
Shave your head.
Nair.
With a razor
best to wax or shave. tweezing is slow.
To shave it while you are under the shower.
down strokes To get a closer shave use the up stroke method. This causes problems with ingrown hairs due to the fact you are cutting against the grain, so to speak. Using down strokes will cut the hairs but not as close and fewer ingrown hairs.
The best time to shave is after a bath or a shower! Make sure yu scrub under your arm with a cloth with soap on it! after that, get your shaver stick and shave the opposite way of which your hair grows! I know it sounds gross but its very true! Like Selena Gomez's pits! That's how they will turn out if you do that!