Canon MV830 Instruction Manual page 131

Viewfinder
Clean the viewfinder screen using a blower brush or a commercially available cleaning
cloth for glasses.
Video Heads
When the playback picture becomes distorted, the video heads need to be cleaned.
To maintain the best picture quality, we recommend cleaning the video heads
frequently with the Canon DVM-CL Digital Video Head Cleaning Cassette or a
commercially available dry cleaning cassette.
Tapes already recorded with dirty video heads may not be played back correctly even
when you clean the video heads.
Do not use wet type cleaning cassettes as this may damage the camcorder.
Condensation
Moving the camcorder rapidly between hot and cold temperature may cause
condensation (water droplets) to form on its internal surfaces. Stop using the camcorder if
condensation is detected. Continued use may damage the camcorder.
Condensation may form in the following cases:
When the camcorder is moved from an
air-conditioned room to warm, humid
place
When the camcorder is left in a humid
room
How to avoid condensation:
Unload the cassette, place the camcorder in an airtight plastic bag and let it adjust to
temperature changes slowly before removing it from the bag.
When the camcorder is moved from a
cold place to a warm room
When a cold room is heated rapidly
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