Canon B160 - Manual (Page 131)

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Maintaining your handset_____________________
To maintain your handset in top working condition, be sure to follow these guidelines.
• Do not leave your handset exposed to direct sunlight.
• Do not install your handset in hot or humid conditions.
• Do not spray aerosol polishes on your handset since they may enter the holes on your handset and cause
damage.
• Use a damp cloth to clean your handset.