Check those expiration dates!! We all know that using mascara too long can lead to an eye infection, but have you stopped to think about what will happen when everything else expires? You are opening yourself up to infections, and some products stop being effective over time. Worst one (in my very humble opinion) is sunscreen!! I had never thought of this until I realized I was using a sunscreen from over a year ago. So check this little symbol, it tells you how long the product is good for after it has been opened. This one expires 12 months after it has been opened. Also note, sometimes the info is on the box and not the actual product.