While we’ve been wearing masks all day errday in Hong Kong for months due to the Covid-19 pandemic, most of us still haven’t found a perfect solution to fogged-up glasses. A South Korean ...

But wearing masks all the time can come with its own related annoyances — like foggy glasses, not being able to eat or drink in public, and battles with kids or spouses about who needs to wear them.

If you have worn a mask and glasses together for more than a quarter of a second, you are probably annoyed that we don’t have a magical solution for foggy lenses. Moisture-laden air is also a ...