ND: The tighter the roll is packed, the easier it is to cut for sure. Another tip that I find works well for cutting is to place two rolls parallel to each other and cut through both in one slice together while holding the uncut end with your left hand (assuming you cut with the right). You should also periodically wipe the knife with a damp paper towel because the sushi rice causes a build up of sticky residue that can get in the way of cutting. I hope that helps!