My Victorinox Mauser was getting a bit hard to open so I spent some time cleaning it today. The blade slots are too narrow for cotton swabs so I used a pipe cleaner bent in a J and some Goo Gone to clean a couple of decades of old lube and grime. Oiled it with some 3in1 on a small artist brush so as not to overdo it. Works smoothly again. Love the knife but I would have rather had both a can opener and bottle opener instead of the clip point blade they added for the Mauser version.