How many times do you strop during a shave? I'm getting pretty good shaves not dfs or bbs just yet.But I've noticed after say the left cheek and neck,I need to restrop to bring the edge back.I mean I'm leaving hair no matter what angle I use or pressure or number of strokes I'll leave a patch of hair until I restrop then, gone.Should my edge be so dull that when I'm done I can hardly cut the hair on my hand?Should I hone on the swaty?Thanks for any input. Aaron