What do you mean it’s expired?

Hydrogen Peroxide

Jupiterimages / Getty Images

Jupiterimages / Getty Images

 

 

When it’s opened, hydrogen peroxide only lasts a few months before it becomes ineffective (aka turns to water). Unopened, it should be tossed after a year. You’ll know when it’s bad when it stops fizzing.


 

Rene Drouyer / Getty Images

Rene Drouyer / Getty Images

 

 


Insect Repellent

Insect repellent loses effectiveness after around two years from the manufacture date, which should be marked on the bottle. Don’t let the bugs win.


 

 

 

Helder Almeida / Getty Images

Helder Almeida / Getty Images


Bike Helmets

Like car seats, bike helmets can lose their safety effectiveness over a couple of years and after any kind of crash or trauma.


 

 

 

 

Tab1962 / Getty Images

Tab1962 / Getty Images

Smoke Detectors

Smoke and carbon monoxide detectors can stop working after 10 years, even if the batteries are replaced.


 

 

 

Gilles Paire / Getty Images

Gilles Paire / Getty Images

Batteries

Batteries start to expire as soon as they’re made, so the expiration date printed on them or the package is based on this and not when or how they’re used. The shelf life differs between types and sizes of battery, as well as where they are stored.


 

 

 

Antos777 / Getty Images

Antos777 / Getty Images

Fire Extinguishers

Most fire extinguishers don’t expire for five to 15 years, depending on the type, but things like cracks in the hose and the pressure can affect how well they work.


 

 

 

Farakos / Getty Images

Farakos / Getty Images

Sunscreen

According to the Mayo Clinic, most sunscreen works at full strength for around three years.

 

 

 

 


 

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