3. Mouthwash
Expires In: 3 years
Average Price: $2.94-$3.99*
According to Colgate, mouthwash does go bad, especially if it is therapeutic (meaning that it is designed to reduce harmful bacteria and help with symptoms of dental diseases like dry mouth, plaque buildup, receding gums, and gingivitis). Most mouthwash has alcohol or some other type of antiseptic in it, along with a good deal of water.
Mouthwash ©New Africa / Shutterstock
If therapeutic, the mouthwash might lose its potency, rendering it useless. Even if you have regular antiseptic mouthwash, it might lose its bite and become no more than minty water if expired. Replace your mouthwash no more than three years after the manufacture date.
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