This came in on the Lords of the Mini list. From The MINIMOOG Model D - Technical Service Manual
"Section VIII: Keyboard Maintenance
Occasionally il will become necessary to clean and adjusl the keyboard. The contacte, although gold plated, may become dirty, conlaminated, or corroded. When conlacts become poor, noises and erraíic sounds may be generated while playing the instrumenL
To service lhe keyboard, the bottom cover must be removed. This cover is held on with 8 wood screws. If the keyboard compartmení is found to be excessively dirty, it should be blown out with air first.
Avoid touching the buss bars Or the spring contacts with the fíngers since hand oils and perspiration will cause corrosion. Under normal conditions, any dirt can be removed by spraying the assembly with a light coating of a high grade contact cleaner. At the factory, we use and recommend Cramolin®. If this is not availabie, TV tuner spray may be used. Do not under any ciTcumstances use abrasives or abTasive tools, since this will destroy the goldpiating. If spraying does not cure the problem, try wiping the buss bar with a cotton swab in the área of the problem key OT keys.
Sometimes it is necessary to adjust the spring contacts for more tension. This is done by bending the spring so thal it is closer to the buss bar. It is easiest to bend at the end nearest the mounting board. In ali cases, the "pitch" contact must occur before the "trigger" contact. The pitch buss bar is nearest the front of the instrument. The trigger buss bar is in the center, and the third buss bar nearest the rear of the instrument is not used and therefore need not be cleaned or adjusted.
To clean fhe keys, use a soft cloth moistened with a mild soap solution. Never allow solutions or spray cleaners to run down between the keys. Avoid harsh solvents, since the keys are made of plastic and may be dissolved. Scratches may be removed with a plastic or automotive poiishing compound. Waxing the keys is not recommended."
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