Hey Guys, just wondering how long sun tan lotion can last. Only my parents have only brought factor 8 this year and we have some 15 and 20 from last year, so is it better to wear the 15 or 20 from last year (thinking about it could even be the year before) or the factor 8 that was brought a couple of days ago, because doesn't sun tan lotion have a certain lifetime so it becomes less effective?
Much help appreciated as i plan on sunbathing tomorrow to get a tan for the ball at end of week but dont want to to turn up red and burnt!