Hmm I've never had issues with it. :S Sorry to hear that. I don't really know then, hopefully some others can give you insight to better mice that aren't the Naga. I used to use a microsoft mouse before the Naga because I liked the feel of it (Regular wired one).
My Naga Molten is as strong as the day i took it out of the box. Dirty as a bastard pig, but working perfectly.
Mine was spotless and shiny, but the left click started messing up after a month or so, right click started doing this double click thing too. Both of those issues making it near impossible to properly play a game that requires you to hold the buttons down for a period of time.