Care And Maintenance - Madrigal Audio Mark Levinson 36 Operating Manual

Caution!
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Care and maintenance

To remove dust from the cabinet of the Nº36, use a feather duster. To remove dirt
and fingerprints, we recommend isopropyl alcohol and a soft cloth.
Always apply the isopropyl alcohol to the soft cloth and then
wipe the Nº36 with the dampened cloth. Never pour even
small amounts of any liquid directly on the Nº36, as doing so
may allow the liquid to reach the circuitry inside the unit. Any
liquid inside the unit poses a hazard to both the user and to
the unit, and must be avoided.