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Old 9th September 2010, 05:52 PM   #5
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I have used with great success a steam house cleaner (vaporetta, as they call it in Italy and Spain). It allowed me to recover a zipper that had been blocked for more than a year. Just direct the steam to the salt blocks and they dissolve. Just be careful that you do not overheat the board (i.e: push it as far as you can to the opposite side of the bag)
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