Sweat, sea water, and pool chemicals all break down sunscreen faster than manufacturers’ labels suggest under milder climates. Plain water helps, but it doesn’t replace the electrolytes lost through sweating during long beach days. This is why many contact lens wearers switch to weekly contact lenses for the season instead. For those who prefer slightly longer wear between replacements, 2 weekly contact lenses are another common choice, offering a bit more flexibility without pushing wear time too far. Others opt for fortnightly contact lenses more generally, replacing them every two weeks regardless of brand.