Since the pandemic began I've been asked on several occasions if I advise buying a UVC light sanitising machine for glasses, and I often see them advertised on social media', says Daniel.

Rinsing your glasses is recommended as it helps to remove bits of dirt and grit that could otherwise scratch your lenses, but if the water is too hot it will also cause damage.

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Alcohol is an aggressive chemical which with repeated use will erode both the lens coatings and the frames of your glasses. The ingredients in household cleaners aren't designed with reading glasses and sunglasses in mind, and they're as damaging as they are ineffective at cleaning them. They're also quite expensive as there's an ongoing cost for them,' says Daniel. 'When used sparingly, however, they are handy for scenarios such as travelling, where it's more convenient to have something you won't have to keep with you once you've used it.' Window and glass cleaner sprays are the go-to for cleaning glass and mirrored surfaces around your home, so why not the glass that you wear?

While there are some studies that say UVC light can be effective at viral cleaning, the College of Optometrists and the Scottish Government conducted an evidence review on this topic and weren't convinced. It might sound rather obvious, but if you're using a spray of any kind you must also remember to take your glasses off first. I've seen plenty of people who've hurt themselves because they forgot to take their glasses off before spraying them.' 4) The corner of your clothes This is the best option,' advises Daniel. 'Most optometrists will supply you with a bottle of lens cleaner and a microfibre cloth when you first get your glasses, so most people start off with the best option to hand already.' Even if UVC light is an effective sanitiser for your glasses, it won't remove any grease or dirt from them, so they're still limited in their usefulness.'

You could be rubbing dirt - which may not always be visible to the naked eye - into your glasses. This will not only fail to clean your glasses properly but could add lots of tiny scratches to the surface of your lenses, too,' according to Daniel. Sometimes it can be all too tempting to just give your glasses a scrub with a bit of your t-shirt, but it should be avoided if you can help it. They're delicate and aren't designed to cope with high temperatures. Boiling water will be especially damaging.' 7) Soap There's a huge variety of single-use microfibre lens wipes that are purpose-built for cleaning glasses, and they can be very effective at doing it.