The World Health Organization has Five Moments for washing hands: 1  before patient care. 2  after environmental contact. 3  after exposure to blood/body fluids. 4  before an aseptic task, and. 5  after patient care.
This means that you can use leftover sunscreen from one year to the next. Some sunscreens include an expiration date â a date indicating when they're no longer effective. Discard sunscreen that is past its expiration date. If you buy sunscreen that doesn't have an expiration date, write the date of purchase on the bottle and be sure to throw it out within three years. Also, discard sunscreen that has any obvious changes in color or consistency.
Bath oil: One year to use up that gorgeous bottle with the lavender stems; don't delay. Sunscreen: Check the package for an expiration date, but if you still have last year's opened bottle of sunscreen, you should abandon it. Aim to use it up within six months of first use; if you don't, you're probably not using it enough. Mascara and liquid eyeliner: Three to four months once you start using it.