Just use vinegar and water. It shouldn't harm the glass or silicone, but will desolve all the salt deposits. Then you can rinse it out. Using a plastic scrub pad or towel will cause equal harm if any is to be had. The pad/towel won't scratch anything, but any sand you get in, may.
PS, I hate you mike. Where did you find a site? I may still have go this weekend if I am lucky lol.