Knowing when to replace makeup and skincare can protect your routine from contamination, irritation, and products that no longer perform as intended. This reusable guide explains the period-after-opening symbol, offers practical product-life ranges, and provides a simple checklist for inspecting, storing, and replacing beauty products.
Overview
Beauty products do not all age at the same speed. A dry powder used with clean brushes may remain usable longer than a liquid product applied directly to the skin, while eye products deserve a more cautious approach because they are used close to sensitive tissue. Packaging, preservatives, applicators, storage conditions, and how often a product is opened all affect its useful life.
Start with the product’s packaging. Look for an expiration date, a batch or lot code, and the period-after-opening symbol: a small open jar marked with a number followed by “M,” such as “6M” or “12M.” The number indicates the manufacturer’s suggested use period after opening. It does not mean six or 12 months from the purchase date. If a product has both an expiration date and an open-jar symbol, follow whichever limit comes first.
When there is no clear date, use the ranges below as practical review points rather than guarantees. A product should be discarded earlier if its smell, color, texture, packaging, or performance changes, or if it has been exposed to unusual heat, moisture, or contamination.
| Product category | Useful review point after opening | What to watch for |
|---|---|---|
| Mascara and liquid eyeliner | About 3–6 months; use a shorter window if the product dries out or has been contaminated | Dryness, clumps, odor, eye irritation, or repeated pumping of the wand |
| Cream eyeshadow and liquid eyeshadow | About 6–12 months | Separation, hardening, changed color, or an applicator that is difficult to clean |
| Liquid foundation, concealer, and skin tint | About 6–12 months | Separation that does not remix, sour smell, changed shade, or a faulty pump |
| Cream blush, bronzer, and contour | About 6–12 months | Dry or waxy texture, pilling, or visible contamination |
| Powder blush, bronzer, eyeshadow, and setting powder | About 12–24 months | Hard pan, persistent odor, dampness, or a surface that no longer picks up product |
| Lipstick, lip liner, and lip gloss | About 12–24 months | Waxy or sour smell, sweating, texture changes, or use during an active cold sore |
| Cleanser, toner, moisturizer, and serum | Often about 6–12 months, depending on the label and packaging | Separation, color or scent changes, irritation, or a compromised pump or dropper |
| Sunscreen and acne treatments | Follow the printed expiration date and storage instructions | Do not rely on appearance alone when the labeled date has passed |
| Sheet masks and single-use treatments | Use by the printed date and immediately after opening | Damaged seals, dried-out material, unusual odor, or leaking packaging |
These are broad editorial guidelines, not a substitute for the instructions on a specific product. Formula changes, refill systems, natural or low-preservative formulations, and packaging updates can alter the appropriate timeline.
Checklist by scenario
When you open a new product
- Check the printed expiration date before removing the seal.
- Find the open-jar symbol and note the stated number of months.
- Write the opening month and year on a removable label or in a beauty-tracking note.
- Record the product’s shade or formula if you own several similar items.
- Keep the original box or photograph the instructions if the packaging contains important storage information.
When a product has been open for a while
- Inspect the smell, color, consistency, and application.
- Check whether the cap, pump, dropper, or applicator closes securely.
- Look for water droplets, visible debris, mold-like growth, or unusual separation.
- Consider how the product was used: shared, carried in a hot bag, stored in a humid bathroom, or applied directly to the skin.
- Replace it if you cannot remember when it was opened and the product is an eye, liquid, cream, or treatment formula.
After an eye infection, cold sore, or skin reaction
Do not keep using a product that may have contacted an infected or irritated area. For eye products in particular, discard items that were used during an eye infection rather than trying to clean the formula. Replace or thoroughly clean reusable tools according to the manufacturer’s instructions, and seek professional medical advice if symptoms persist or worsen.
Before packing for travel or an occasion
- Choose products with secure closures and avoid taking nearly empty, cracked, or leaking containers.
- Keep beauty products away from direct sun and high heat during transport.
- Use clean tools and avoid sharing makeup, brushes, lip products, or eye applicators.
- Review older products before building a holiday, festival, wedding, or vacation makeup bag.
What to double-check
Packaging matters. Airless pumps and sealed tubes generally expose a formula to less air and contact than an open jar, but packaging does not cancel the printed instructions. A dropper that touches skin, a cream jar used with fingers, and a doe-foot applicator returned to the container can all introduce contamination.
Storage matters. Keep products tightly closed in a cool, dry place away from direct sunlight. A bathroom may be convenient, but repeated heat and steam can be harder on formulas than a dry drawer or cabinet. Do not freeze products unless the manufacturer specifically permits it, and avoid leaving beauty bags in a hot car.
Performance matters. A change in scent is an obvious warning, but texture and application can change first. A foundation that separates, a serum that becomes cloudy, or a lipstick that drags may no longer be suitable even if the product is within its approximate time range.
Special formulas need extra attention. Sunscreen, retinoid products, acne treatments, and other products designed to deliver a specific active ingredient should be judged by their labeled expiration date and storage instructions. If the label is missing or unreadable, contact the manufacturer rather than guessing.
Common mistakes
- Confusing purchase date with opening date: A product may have sat unopened for months, so mark the day you first use it and still check the expiration date.
- Adding water to dried mascara or eyeliner: This changes the formula and can introduce contamination. Replace the product instead.
- Keeping products because they are expensive: Cost does not extend a product’s safe-use window. Use value as a reason to buy smaller sizes or avoid overbuying, not as a reason to ignore warning signs.
- “Sanitizing” the formula: Wiping the outside of a package does not restore an old liquid or cream product. Clean the exterior and tools, but replace compromised formulas.
- Relying only on smell: Some products can change without an obvious odor. Use the label, opening date, storage history, and visible performance together.
- Sharing eye and lip products: Sharing increases contact with other people’s skin and mucous membranes. Keep personal products personal, especially mascara, eyeliner, lip gloss, and lip balm.
- Donating opened products: Once a cosmetic has been opened or used, it is better suited to personal use only. Unopened items should still be checked for intact seals and valid dates.
When to revisit
Make a beauty-bag check part of a quarterly routine, ideally at the start of a new season. Review products again before travel, event makeup, allergy season, or a major skincare change. A seasonal reset is also a useful time to wash brushes, replace worn sponges, clean makeup-bag interiors, and move products away from a steamy bathroom.
Revisit this guide whenever a brand changes its packaging or labeling, when you buy a new type of formula, or when an official product instruction changes. The most reliable routine is simple: mark every opening date, follow the printed label, store products thoughtfully, inspect them before use, and discard anything that looks, smells, or performs differently. If a product causes burning, swelling, rash, or persistent irritation, stop using it and seek appropriate medical advice.
For a broader beauty reset, pair this checklist with a makeup routine built around your skin undertone: How to Build a Simple Makeup Look Around Your Skin Undertone. The goal is not to own more products, but to keep the products you use in a condition that supports a reliable, comfortable routine.
