C a r e a n d m a i n t e n a n c e19. Care and maintenanceYour device is a product of superior design and craftsmanshipand should be treated with care. The following suggestionswill help you protect your warranty coverage.• Keep the device dry. Precipitation, humidity, and all typesof liquids or moisture can contain minerals that willcorrode electronic circuits. If your device does get wet,remove the battery, and allow the device to dry completelybefore replacing it.• Do not use or store the device in dusty, dirty areas. Itsmoving parts and electronic components can be damaged.• Do not store the device in hot areas. High temperaturescan shorten the life of electronic devices, damagebatteries, and warp or melt certain plastics.• Do not paint the device. Paint can clog the moving partsand prevent proper operation.• Use a soft, clean, dry cloth to clean any lenses, such ascamera, proximity sensor, and light sensor lenses.• Use only the supplied or an approved replacementantenna. Unauthorised antennas, modifications, orattachments could damage the device and may violateregulations governing radio devices.• Use chargers indoors.• Always create a backup of data you want to keep, such ascontacts and calendar notes.• To reset the device from time to time for optimumperformance, power off the device and remove the battery.