Gillette says it has made its best cartridge even better with a product scheduled to reach North American store shelves in late December with more global availability in January. The new Gillette Fusion ProShield with lubrication before and after the blades, which shields against irritation during every shave, according to the P&G brand.   According to recent studies, most guys take about 170 strokes every time they shave, and 120 of them are re-strokes over the same area of the face after ...