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October Surprise 2024

How to make a bathroom mirror antifog

I have a bathroom wall mounted mirror ( approx 20 inch x 15 inch) I use for shaving that tends to fog up completely after I shower due to the steam. Do all mirrors fog up? Are there solutions to this problem? ( Other than just switching to cold showers! šŸ™‚ ) The mirror is fairly old maybe 20 years , would that affect the fogging characteristics?