The secret for me at least is to use the Milady's Barbers Manual that shows the shaving order a barber would take to do a normal straight shave that only needs touch ups. With it you move in a set of stages cut to clear the face of stubble. Some strokes will not be WTG especially with the chin area as the manual shows an XTG pass but the hair is more resillent and I haven't had any problems when I have done it. That may be a solution or you may do a WTG and two opposite XTG passes which is what I currently use with only a a fractional percent of irritation.
EXPECT success in every shave and the universe will certainly make way for that success.