8CleaningHigh-glossy models can develop white stains on the surface if an ultrasonic wave humidifier is usednearby.֜ Contact your nearest Samsung Customer Service Centre if you want to clean the inside of the product(Service fee will be charged.)Do not press the product screen with hands or other objects. There is a risk of damaging the screen.֜ Exercise care when cleaning as the panel and exterior of advanced LCDs are easily scratched.Take the following steps when cleaning.1 Power off the product and PC.2 Disconnect the power cord from the product.֜ Hold the power cable by the plug and do not touch the cable with wet hands. Otherwise, an electricshock may result.3 Wipe the product with a clean, soft and dry cloth.Wet a soft cloth in water, wing it out well, and then use the cloth to wipe the exterior of the productclean.– Do not apply a cleaning agent that contains alcohol, solvent, or surfactant to the product.– Do not spray water or detergent directly on the product.4 Connect the power cord to the product when cleaning is finished.5 Power on the product and PC.Correct posture to use the productUse the product in the correct posture as follows:• Straighten your back.• Allow a distance of 45 to 50cm between your eye and the screen, and look slightly downward at thescreen.• Keep your eyes directly in front of the screen.• Adjust the angle so light does not reflect on the screen.• Keep your forearms perpendicular to your upper arms and level with the back of your hands.• Keep your elbows at about a right angle.• Adjust the height of the product so you can keep your knees bent at 90 degrees or more, your heelsattached to the floor, and your arms lower than your heart.• Do the Eye excercises or blink frequently, then eye fatigue will be relieved.