We had an infestation of late and that post was helpful. We used the anti-mite paper, which you can now get on Amazon (http://www.amazon.com/Anti-Mite-Paper-18-10-Roll/dp/B005P0EBGE/ref=sr_1_1?s=industrial&ie=UTF8&qid=1361372521&sr=1-1&keywords=anti-mite+paper).
That was used to protect area where we stored plates. If you have programmable incubators, those can be cleaned by heating to 55ºC-60ºC. I put an infested plate in the incubator at 60ºC and mites were dead in 45 min. I left the incubators 36 hours to be sure. Get a magnifying glass and look throughout your bench to see if you can identify the source. Spray down your bench with ethanol frequently and repeat all of the above diligently. These infestations are easy to take care of if caught early, but quickly spiral out of control.
Good luck!