| I have the Sharper Image Ionic Breezes.  I clean the plates once a week, and one unit is good enough for an entire floor.  It removes cat dander, which is a lifesaver for me, as well as any other particulates.  I've never seen an accumulation of residue on my drapes or walls, however.  It is also very good for hayfever season. 
				__________________"We are supposed to be masters of space, but we cant even line up our shoes?"
 
 One life, one chance, one opportunity.
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