I love this cute little plushie fish that attach to the side of your monitor like an algae-gasping catfish until your screen gets dirty, at which point it can be plucked off and used to squishily squeegee your monitor free of grime. They also come as spiders and caterpillars, but I think the fish is the best one. Only $7.
Animal Screen Cleaners [Perpetual Kid via Geeksugar]



Too cute and functional to boot
They definitely look like SPORE creatures.
This is a much better animal screen cleaner:
http://www.youtube.com/watch?v=Zfl6wJsjDy4&feature=related