I left my khukuri at my mom's house, on my bed, and under a few blankets about a week ago. No liquid was spilled on my bed or anything, so it was dry. I cleaned off the blade before I went to my dad's house. I just got back today, and as I threw the blankets off of my bed, there it was..... a tennis ball- sized patch of rust staring me in the face! I bolted to my drawer and got out the steel wool and green brillo pad, and I went at it, scrubbing like I was trying to start a fire. I got all of the rust off, all that is left of it is some minor discoloration (the steel is a lighter color) and some scratching where the rust was. So, what can I do to stop this from happening again? I don't have any oil, but I'll get some here in a week or so. Should I store my khuk in an open air environment, not covered with anything? (like blankets) Should I store it in its sheath? Thanks everyone.