Wylie, I have practiced and found that if I score once the tile does not break cleanly but if I score twice at the begining of the cut I can get a clean cut. Also I read the owners guide (as you should) and it says 'Apply increasing pressure on the handle until the tile snaps along the score line' this seems to work. So no sharp snaping action as this will break the tile. I will get some more tiles to practice with till I am confident.