Good lord man!! I have taken two of mine apart in the past and never all that come out. Sure some dust but that was about it. Now, at work, I looked into one of the keyboards once. They looked like your mouse!! Nasty!!!!Sent from my iPhone using Tapatalk
Actually since we stopped having balled mice and gone optical they seem to get less gunked up.The good ole days of cleaning gunk off the rollers and washing the ball itself with dish soap...
It was fun to take the ball out of a coworker's mouse without them knowing. My modern adaptation is to tape over the sensor of an optical mouse.
Haven't had a trackball mouse since we got rid of the old HP Pavilion from 2002 about 4 years ago. For me, the switch in the middle button always fails within a couple years or so. I went with MadCatz (seeing as after the company went bust, their products were being liquidated at pennies on the dollar), and I've not had an issue with my RAT 1s or RAT M, and have the added benefit of programmable buttons for whatever.