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Very fine dirt can accumulate in the fluid after several uses despite the filters supplied with the Knosti. Suggest use coffee filters of the type used with coffee makers. These are made of a very fine paper and effective. Some colouring will remain in the used fluid and may well be the residue from years of exposure of vintage records to tobacco smoke.. Also, suggest very grubby records are washed first before using the Knosti to avoid the chance of fine grit being trapped in the brushes and effectively ground into the record surfaces during the cleaning process.

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I have now cleaned dozens of my old LPs with the Knosti fluid in the Knosti Record Cleaning Machine, and am delighted with the results.

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Great product and suppler always excellent.