Don Posted July 10, 2019 Share Posted July 10, 2019 I am from Australia and would like to know why Opti-Glass Clean and Protect can't be used on interior windows? Can ONR be used on interior windows? Is there another product that can be used on interior windows? Quote Link to comment Share on other sites More sharing options...
Ron@Optimum Posted July 10, 2019 Share Posted July 10, 2019 Don, welcome to the Optimum Forum. Opti-Glass Clean & Protect will cause interior glass to fog up (the hydrophobic characteristics). ONR can be used on interior glass with no issues. Quote Link to comment Share on other sites More sharing options...
Don Posted July 11, 2019 Author Share Posted July 11, 2019 Thanks Ron for your reply. Do you know if Opti-Glass Clean and Protect can be used on interior office or house windows or will you have the same problem? Quote Link to comment Share on other sites More sharing options...
Ron@Optimum Posted July 11, 2019 Share Posted July 11, 2019 I've used it on interior/exterior house windows with no problem... Quote Link to comment Share on other sites More sharing options...
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