I'm not sure what kind of Finnish lead you're smoking, but I said a few posts further up that I'm one of the few who have *never* had issues with "gunk" getting trapped on or under the scroll ball. If people like me complain about it, I guess I'm not people like me.
The notion that the slit between two discrete mouse buttons is some sort of gunk trap is such a pathetic excuse it barely warrants a comment. There are hundreds of mice on the market with such a design, how do you think those work? Do you think people clean them with a toothbrush daily? If this had been an issue, people would have abandoned Logitech and Microsoft long ago and flocked to that one glorious mouse on the market where gunk can't get in. I guess that's why Logitech is past the 1 billion mice mark while Apple has sold a whopping, what, thirty-five Mighty Mice?
Please save your diary notes-to-self for, well, your diary.