Hyundai sonata Owner's Manual page 217

NOTICE
• Do not spray the camera or its
surrounding area directly with a high
pressure washer. Shock applied from
high pressure water may cause the
device to not operate normally.
• Do not use any cleanser containing
acid or alkaline detergents when
cleaning the lens. Use only a mild
soap or neutral detergent, and rinse
thoroughly with water.
• Always keep the camera lens clean.
The camera may not work normally
if the lens is covered with dirt, water
or snow.
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