So, a couple of weeks ago I was running a long imaging sequence, and while I was indoors bingeing on Big Bang Theory, it went from clear to raining in about 90 min, and it rained into my 'scope while I was imaging M51 (which was very high in the sky at the time). I covered it as soon as I noticed the rain, and uncovered it, drained it out (yes, some water ran out) and dried everything out the next morning, but now I have a LOT of water spots on the primary. How do I know if it's bad enough to risk reaching down the tube to clean the primary? Right now, I can't see anything on my frames, but am not totally sure what I would be looking for. I don't think I'll have to disassemble anything to reach down past the secondary, so it should be low risk, but is it worth the effort?