I'm happy to hear you care enough to address it.
The easiest way is to make a mini clean room:
Buy some Masonite, a sheet of plexiglass, some 1" by 1" wood, wood glue, some small hinges and some Velcro.
Cut the masonite up so you have 2 sheets which are 1' (foot) sq. these will be the ends of the box. Cut 3 more sheets 1' by 1 1/2' these will be the back, front and bottom (if you want a larger box just adjust the dimensions).
Carefully glue the wood around the inside edge of the two ends (all four sides). You will want to leave a small lip exposed of the masonite where the Velcro tape holding the front, back and bottom panels so the panels rest on the edge of the inside of the end pieces. Mount a block of wood on the back panel to hold the hinged plexiglass panel.
Now you'll need to fashion a clean air source: A hair dryer which can blow unheated air pushed though a HEPA filter should do the trick. Cut a hole in the side panel do fit the filter and hair drier (Do make sure the heat doesn't have a way of turning on!) You don't want the box to be air tight as you need some way for the air to escape. You also don't need a wind storm here only enough to keep things dust free.
Pop down the front panel so you can get your hands in to work don't forget a good desk lamp.
We have a few of these setup and find them vey useful keeping things dust free.
Don't forget to use a humidifier with distilled water as the dry air will make is harder as well (static) and using the distilled water will make sure you're not creating more dust with the minerals in the water.