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surrounding environment is particularly dirty, which can cause dust deposition
lamps.Please use a glass cleaning solution and a soft cloth to wipe the focusing
optical lens. Carefully Qi dry each part. At least 20 days to clean the dust outside a
lens, the lens inside 30-60 days to clean up the dust once. Regular inspection lamp
fan and bottom case fan, a fan of at least 20\days to clean up dust deposition.
Above cleaning must be executed in case of power failure.
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