I recently spilled coffee on my trackball (go me) and I cleaned it with rubbing alcohol and then left it in the sun.. It works fine now, maybe that will help?
But I did wanna say one thing, your simpsons quote is all wrong..
Its either "English? Who needs that? I'm never going to England" - Homer Simpson
or "Me fail English? That's unpossible!" - Ralph Wiggum
Sorry, it was just so obviously wrong, I had to say something haha
Hope your curve gets fixed!