Ideally the hairs should be a centimeter or two long.
If you are taking a bath, sink into the bath so that your underarm area is submerged. If you are taking a shower, stand under the water so that your underarms are under the stream, or splash water onto your underarms.
If you’re planning on waxing your underarms, make sure to exfoliate a couple days prior and to use proper wax techniques to ensure the skin is kept intact.
Shaving gel is designed to moisturize and prime your hair for getting shaved, giving you a close shave while at the same time protecting your skin from getting nicked by the razor.
Also make sure to use a sharp, new razor. This will give you the closest shave.
Make sure that the areas you are shaving are still covered in shaving gel. If they are not, redistribute the gel or add more. If you notice hair building up in your razor, give it a quick rinse to get the hair off.
If you have very sensitive skin, don’t shave upward, as this can irritate sensitive skin.
Don’t put on deodorant directly after shaving, as this can cause irritation.