WD-40 is a water displacer by name and function, but it leaves a greasy film which attracts other contaminates, and I believe it also conducts. My understanding is that you should never use WD-40 on electronic equipment, with the exception of moving parts like drive mechanisms, and even then you should use a lithium grease. This was well-known back the in BBS days, and I assume that similar mentions are on the Internet or in news groups.
I am in the process of transferring all of my electronics into plastic storage crates for several reasons. The primary being ease of transport, either moving or shuffling around in the storage area, and the secondary being that I found my storage boxes causing accelerated yellowing. The storage crates I have chosen are not air-tight, but have a good history of keeping out the creepy-crawlies.
