I'd recommend just stripping it all the way down every once and awhile for thorough cleaning. In my experience they're not overly difficult to strip. This will allow you to clean and lube every part specifically and help insure you don't leave anything wet. I have seen BM liners with surface rust before. I'm not sure about the springs, but I choose not to risk it. I actually grease up both springs entirely when I clean mine. I'd also not be as worried as some seem to be about it voiding the warranty. If you're handy in the least, and therefore able to put it back together, BM will never know.
If you have compressed air, that would be a good option if you decide to wash it in water. If not, just let it dry fully and lube it up.
