Using a hoof knife is fairly simple – the more you do it, the easier it becomes. You can use it to clean up the exfoliating sole, but also to get rid of the frog when it shreds – not to mention the bars. Hold your hand with the palm facing downwards. The knife should point away from you. Use the thumb to push it. Sometimes, a simple sawing motion might be needed, especially when it comes to trimming frogs. Keep in mind that patience is probably the most important thing in the process.