Anyone else experience rusty screws? I flew one time when it started to rain lightly mid-flight, immediately packed it up and dried it off as well as I could. I noticed some of the tiny, panel cover screws on the body were rusty. Then we spent three weeks in Costa Rica. A lot of humidity. I've always kept a bunch of silica packets throughout the case but still - most of the black screws have gone rusty. Any thoughts on how to treat/prevent/deal with this? I've been told they should be fine, though unsightly and an aircraft mechanic suggested wiping them with alcohol and then some type of oil.