I've never used a shavette but from what I gather people use a higher blade angle than with a straight. Like has been said before, try different angles. You may try and keep the spine almost touching your face while using short confident strokes. You may also be suffering from an almost shave ready edge though I have heard harts come with a good edge. I have a 6/8 hart I bought second hand. The guy said he only shaved a few times with it. If the edge that I received it with was indicative of how it leaves the factory I would think about touching it up.