The first tip to getting the closest shave is to ensure you're pulling the skin taut, so that you only need one pass, but trimming beforehand will help with this. Your skin down there isn't as firm and the hair tends to be coarser than your legs, so keep this in mind. Oh, and always make sure you rinse between strokes.
You can press down the blade for a closer shave, but don't go too hard and be gentle as this could lead to nicks. Make sure to pick out a razor with a sharp blade too, as a dull one can lead to razor burn and fail at removing the hair with one pass. Estrid's Razor Starter Kit (£12), has a shea butter and aloe-powered hydration strip to ensure a smooth glide.
Even more so than the top of your pubic bone, the skin on your labia or lips is a coarser texture, so you want to be extra careful and really take your time. Because you might have a harder time getting visibility here, lift your leg on a dry, flat, elevated surface for easier access to the area and use a small, swivel mirror — and remember to pull the skin taut.
Dr. Asadi tells us to make sure you're shaving against the grain to prevent ingrown hairs. "This way of shaving cuts the hair in an angle that helps the hair to grow out easily instead of getting stuck under the skin and creating ingrown hair," she says.