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Yeh I only went WTG & XTG on the upper lip for a month or 2 until I got the rest of my face with no Irritation,
& yes the blade must be flat against your lip & truely sharp,
I dulled my first blade...

Doug do a search for the "fools pass" here on SRP and this should help,with the upper lip, I personally usually do a 3 pass shave on the upper lip WTG, XTG then fools pass using 2 hands
note I...