![NHS on Twitter: "The longer a bottle of sunscreen is open, the less effective it is at protecting your skin. If you're using the same sunscreen from last summer, check that it NHS on Twitter: "The longer a bottle of sunscreen is open, the less effective it is at protecting your skin. If you're using the same sunscreen from last summer, check that it](https://pbs.twimg.com/media/FTweM1pWQAEOtBb.jpg)
NHS on Twitter: "The longer a bottle of sunscreen is open, the less effective it is at protecting your skin. If you're using the same sunscreen from last summer, check that it
![SunSmart Canberra on Twitter: "SunSmart Tip- check your sunscreen's expiry date....are you really ready for Summer? https://t.co/UqcwvvJfDP https://t.co/REvHOIVTlV" / Twitter SunSmart Canberra on Twitter: "SunSmart Tip- check your sunscreen's expiry date....are you really ready for Summer? https://t.co/UqcwvvJfDP https://t.co/REvHOIVTlV" / Twitter](https://pbs.twimg.com/media/DvaW_M9X0AA4rGJ.jpg)
SunSmart Canberra on Twitter: "SunSmart Tip- check your sunscreen's expiry date....are you really ready for Summer? https://t.co/UqcwvvJfDP https://t.co/REvHOIVTlV" / Twitter
![The secret symbol that tells you when your sun cream really expires - and it might surprise you | The Sun The secret symbol that tells you when your sun cream really expires - and it might surprise you | The Sun](https://www.thesun.co.uk/wp-content/uploads/2018/06/SM-COMP-SUN2.jpg)