Navigating on your HP TouchSmart 3.0 PC is easy, fun and takes nothing more then your fingers. To click, simply create a single point of precise contact between your finger and the screen. The HP TouchSmart uses optics to determine clicks so avoid leaning on it with your hands, knuckles, large jewelry or the random fly. The screen is not pressure sensitive so pressing harder has no effect. To right click you simply press and hold. For tasks that require multi-touch input use more than one finger. To clean your HP TouchSmart PC use any glass cleaner, a fine cloth and wipe gently. Do not spray the cleaner directly onto the PC, this may cause it to drip into the machine. Have fun using your HP TouchSmart.