[. . . ] Use this appliance for its intended household use as described in this manual. Do not use attachments not recommended by Philips Electronics North America Corporation. [. . . ] Philips Norelco reserves the right to verify the purchase price of the product and limit refunds not to exceed suggested retail price. To obtain money-back guarantee return authorization form, call 1-800-243-3050 for assistance. Delivery of refund check will occur 6–8 weeks AFTER receipt of returned product. Com/support Troubleshooting Trimming with a comb  5/32 in / 4 mm This chapter summarizes the most common problems you could encounter with the appliance. If you are unable to solve the problem with the information below, visit www. Solution Pre-trim your hairs with the precision trimmer head and move the appliance against the direction of hair growth. Do not press the appliance onto the skin too hard, as this may cause the hair length after trimming to deviate from the indicated hair length. As not all hairs grow in the same direction, this means that you have to move the appliance up, down and sideways. W Never use scouring pads, abrasive cleaning agents or aggressive liquids such as gasoline or acetone to clean the appliance. When rinsing the trimmer head, always check to make sure the water is not too hot (maximum 100˚F) to prevent your hands from getting burnt. W Turn trimmer off before putting on or taking off attachments or cleaning. W Make sure your hands and trimmer are dry when inserting the battery. [. . . ] NOTE: Make sure to turn the precision trimmer head to the left until the setting indicator points to the ‘On’ indicator (Fig 2) before using. Trimming without a comb    (On) The appliance works, but the result is uneven. [. . . ]