Congratulations, you've made it to the inner sanctum of pixel dust squashing. Here's what you've been missing:
Using a combination of algorithmic and manual methods, you can reduce pixel dust to a mere whisper of its former self.
A clever trick to remove unwanted pixel dust using regular expressions or anti-aliasing.
For the really stubborn cases, try moving the pixel dust elsewhere using sorting algorithms or physical displacement.
Remember, a clean system is a happy system. Happy squashing!