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  • rajesh844 commented on fungus amungus's instructable Open a Stuck Jar with a Knife2 years ago
    Open a Stuck Jar with a Knife

    This process can chip the glass and render the product un-usable...A better & easier method is to pour HOT water on the lid which not only melts the WAX coating (which some manufacturers sometimes apply) but will EXPAND the metal lid ( coefficient of expansion of metal is higher than glass !!) and loosen its grip on the glass.

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