My comp has a mind of its own

[Slinky]

I think it's a problem only with my mouse but sometimes it just randomly hits my mouse1, 2 and 3 and it's been getting worse and worse like a little while ago on schtop it just made me shoot rocket after rocket in front of me and i couldn't control it. Its also annoying in cs because it makes me jump and shoot and hit my use key at the same time. Sometimes it even makes me do all this turny shit so people think i'm hacking. Anyone ever have this problem before and know how to fix it? This isnt only on half-life it happens outside that too. Also my mouse is an mx518

thanks if anyone can help me

[WonderBoy]

get a new mouse, and keep this one clean

[Slinky]

I dont think thats the problem it seems pretty clean to me