Philips SPC230NC Webcam "small blur screen" Questions

...turn it while viewing the image on the computer to set the focus where you like. Also make shure there are NO smudges on the lens, it's small so even the tinyest smudge or spec is huge on the

screen mode My webcam image is very clear when it is in small size frame. However, the image becomes blurred when I click it to full screen. Is there any way to make it clear when it is in full screen