Cosmetics are repeatedly opened, touched, and exposed to air. Heat, sunlight, moisture, and unclean applicators can also affect them. There is no single replacement date that fits every product, so use the label, storage conditions, and visible changes together.
Store products carefully
Keep containers clean and tightly closed when they are not in use. Store them in a cool, dry place away from direct sunlight and temperature extremes. A hot car or a warm, humid bathroom can shorten useful life. If the manufacturer gives special storage instructions, follow them.
Begin with clean hands and tools
Wash your hands before touching a product or your face. Avoid dipping dirty fingers or applicators back into a container. Clean reusable brushes and tools regularly, and let them dry completely. Do not share cosmetics, especially eye products, because sharing can transfer microorganisms.
Mark the opening date
Write the month and year you opened a product on a small sticker or in your phone. Some packaging uses an open-jar symbol, such as “12M,” to show the suggested period after opening. Follow the printed expiry date and the manufacturer’s instructions when provided; local labeling rules can vary.
Watch for changes
Replace a product if its smell, color, texture, or performance changes unexpectedly. Also discard it if the container is damaged, the product has separated and will not remix as directed, or it was contaminated. Never add water or saliva to dried mascara. The U.S. Food and Drug Administration (FDA) notes that industry experts often suggest replacing mascara about three months after purchase, but the label and any earlier change in the product should guide you.
Be extra careful around the eyes
Use only products intended for the eye area. If you develop an eye infection, stop using eye cosmetics and discard those used when the infection began. Do not use store testers unless a new, single-use applicator is provided.
A short monthly check
Once a month, review the cosmetics you use most often:
- Is the lid closing properly?
- Has the product changed in smell, color, or texture?
- Is the opening date or expiry date known?
- Are brushes and applicators clean and dry?
- Has the product been exposed to unusual heat, water, or contamination?
When you are unsure about a changed or contaminated product, the safer choice is not to use it. Stop using any cosmetic that causes a reaction and seek professional advice if symptoms are severe or continue.