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.
04-04-2011, 10:44 AM. Teeth whitening gels do have an expiry date and usually expire in around 1 year. Your particular whitening gel may have been originally supplied in a bulk bag or box and the expiry maybe written on the bag or the box. You should call the dental clinic that provided the gel and find out when that gel expires.