Leica M Instruction Manual page 237

Notes:
• Generally: To protect the Leica M against ingress of dust etc. into
the interior of the camera, it is important always to have a lens or a
cover fitted to the camera body.
• For the same reason, when changing lenses work quickly and in an
environment that is as dust-free as possible.
• As plastic parts can easily pick up a static charge and then attract
more dust, the lens caps and covers should only be stored for
short periods in pockets in clothing.
• As far as possible, both inspection and cleaning of the sensor
should be performed in a dust-free environment to prevent further
soiling.
• Lightly adhering dust can be blown off the sensor cover glass using
clean and, if necessary ionized gases such as air or nitrogen. It
makes sense to use a (rubber) bellows with no brush for this
purpose. Special, low pressure cleaning sprays such as "Tetenal
Antidust Professional" can also be used in line with their specified
usage.
• If the particles cannot be removed from the sensor in this way,
please refer the matter to your Leica Information Service.
• If the battery capacity falls to lower than 40% while the shutter is
open, the warning message
appears in the monitor. At the same time a
cleaning immediately..
beep tone will sound, which continues until the camera is turned
off. Turning the camera off will cause the shutter to be closed
again.
• Be absolutely sure in this case that the shutter window is clear, i.e.
that no object can obstruct the closing movement of the shutter,
otherwise damage may occur.
Attention Please stop sensor
Important:
• Leica Camera AG accepts no liability for damage caused by the
user when cleaning the sensor.
• Do not attempt to blow dust particles off the sensor cover glass
using your mouth; even tiny droplets of saliva can cause marks that
are difficult to remove.
• Compressed air cleaners with high gas pressure may not be used
as they can also cause damage.
• Take care to avoid touching the sensor surface with any hard
objects during inspection and cleaning.
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