albertknappmd Posted March 30, 2007 Share #1 Posted March 30, 2007 Advertisement (gone after registration) I have been using Formula MC on occasion for filter lens cleaning and am very happy with it. Cleans beautifully when dipped on lens paper or a microfiber cloth. My question is how long can the solvent last without losing it efficacy or even changing the chemical composition. Should one not use it after a set amount of time? :confused: Link to post Share on other sites More sharing options...
Advertisement Posted March 30, 2007 Posted March 30, 2007 Hi albertknappmd, Take a look here Formula MC: how long does it last ?. I'm sure you'll find what you were looking for!
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