The blades and tools on my Swiss Tool are so tight that I have to use another tool to pry them out. I have tried holding the lock open to reduce spring tension but that doesn't seem to help. I oiled the pivots but still no help. The knife blades, saw, and file are long enough that I can get them out sometimes but I have bent my finger nails back too many times trying to get the other tools out. What should I do to loosen this tool up?