How should I clean and maintain the Universal Remote Control?
Keep the Universal Remote Control dust free by wiping it with a soft, dry cloth, and do not use corrosive or abrasive cleaners on it. Additionally, do not mix new and used batteries, as old batteries tend to leak and may cause power drain.
From the official Hama Hama Universal 8 IN 1 Remote Control User Manual And Code List manual, page 10
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