I have had a few problem children that had to be put aside until they could be reasoned with. Sometimes I get in a certain mindset that the solution is this or that and plough straight .ahead. When that happens I am unable to see alternate solutions to the problem razor in hand. At that point it is important for me to try again another day. As a general rule a razor gets a certain amount of attention from me, and if it does not progress I put it aside and move on to something else. I am way too stubborn to fight with inanimate object, so the limiting my time helps resolve this for me. Hopefully it makes sense in everyone else's heads too.