Consumers are advised to check packaging for expiry dates on everyday products, as many items beyond food and medicine have a limited lifespan. While some products, like insect repellent, may still work past their expiry date, their effectiveness can be reduced.
Mascara, a widely used cosmetic, typically has a short expiry of three to six months after opening. Using it beyond this period increases the risk of bacterial infection, according to Sara Spary, a Which? senior researcher. An open jar symbol on the packaging often indicates the Period After Opening (PAO).
Batteries can last for many years in storage, with alkaline options like Duracell Plus AA and AAA having a 10-year expiry date. Lithium disposable batteries can be stored for over 15 years. Using expired batteries risks chemical leakage that could damage devices, warns Callum Pears, a Which? senior researcher.
Moisturiser also has a limited shelf life, often six months after opening. Over time, active ingredients can degrade, and preservatives may break down, potentially leading to skin irritation or infections.