I noticed in another thread someone mentioned that the linen/canvas/cotton can sharpen a dull razor and dull a very sharp razor. In my experience I have found that while the leather side definitely improves my razor edges after honing, the cotton side definitely removes sharpness such that I can't get it back without hone touch-up.

Perhaps I suck at linen technique, who knows. But I am curious how many people use it and how many skip it.

Game on!