The different experiences reported are interesting. I wonder if it is a driver version issue. I, like Homeboy and Kermit, installed the newest drivers and experience the "lap-snap" whenever I look down at the keyboard. Traveler, are you also using the latest drivers? I never though of it before , but like Traveler, I move my head around lot. Although I have the TIR unit on my monitor 24" from the reflectors when I'm sitting in the upright position, I'm often leaning in as close as 8-10" when trying to line up shots (eyes don't work as well as they did when I was 25). Moving it out to 3-4 feet will keep the unit at least 2 feet from the reflectors all of the time. I'll give it a try and report.