I bought one of these today in the hopes of making beautifully julienned coleslaws etc. But it’s so disappointing! I tried with apple and carrot and couldn’t get it to cut right through on most of the slices so basically got perforated slices. Then the hand protector. I remember the one my mum had in the 80s had prongs to grip the vegetables but this one doesn’t so have to push quite hard to keep it in place. What am I doing wrong? I’ve tried looking for you tube videos but no one is using the julienne bit.