I don’t do it regularly, just when I start looking like a monkey, but here’s what I do. If I just want to do it quickly I use the trimmer, maybe with a longer setting, because it pinches. Otherwise I use a regular razor, like the Gillette ones and a bit of patience, it’s surprisingly easy not to cut yourself. Sometimes I use depilatory cream, but be careful, if you put too much or leave it on too long it will burn for a few days.