It’s microfiber week at BillyKnowsBest: A week of products made from this miracle polyester or nylon fiber that will change the way you think about cleaning.  First up is a product from the folks who brought you Post-It notes.  While these will never be as ubiquitous as those little yellow squares, you’ll still wonder how you lived without them.  They’re the best way to lift dust and smudges off your eye glass lenses, camera lenses, binoculars, microscopes, computer screens and other delicate surfaces.  $2.79 from Amazon.com, you’ll want one for your dresser, your desk, your glove compartment, camera bag, and a few extras for your friends who won’t want to give them back after you loan it to them.  One caution:  Although microfiber can’t scratch, the dirt it picks up can.  Be sure to wash them often.