Can using my laptop outside mess up my speakers?

This spring, I had been using my laptop (Del XPS M1710) outisde a lot. I have a deck in which the portion below it is enclosed (with the deck as a roof, and big thick-plastic screens as the walls) there are ceiling fans in the enclosed area. I like to smoke my hookah out here with my laptop. I haven't really actually had it in the "real" outdoors. One day I was smoking, and took the coals off of my pipe to go inside for lunch. I was inside for a couple of hours and it had started raining. It was not wet inside the enclosed area when I returned, but I had left my laptop there. No problems. The same thing happened to me a few times over the spring, and I had no problems with my computer. Over the past couple of weeks, though, I have noticed my speakers have gone to crap and are being really really fuzzy and crackly, even at low volumes. It is virtually impossible to listen to music or enjoy videos on it now. I am wondering if the humidity from the few times it rained has damaged my speakers? Is this possible? Also how can I go about replacing the speakers without going through the manufacturer? I have no warranty and do not mind voiding any warranty I might have had in order to replace them myself.