The windpipe area is a tricky spot. The only way I can get any results is by using the tip of my razor and very, very lightly pick at that area, shaving the air more than the skin. And that's with a lot of skin stretching. Usually I pick in all the directions of the compass. But be extremely careful, even with a round nose razor. If you are using a spike or square point I'm even more careful - they 'bite' very easily.