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How Often Should You Actually Replace These Common Household Items?

Most of us keep things far longer than we should — not out of thrift, but because nobody told us there was a shelf life. Here's a simple guide.

SPBy the SonarPick Editorial Team · Updated July 2026 · 6 min read

Some things in your home quietly age past their prime long before they look worn out. Replacing them on time isn't about spending money — it's about hygiene, safety, and simply not putting up with stuff that no longer does its job. Here's a practical guide to the items people hold onto too long.

In the bedroom

Mattress: about 7–10 years, sooner if you wake up stiff. Pillows: every 1–2 years — they collect dust, oils, and lose support. Duvets: 5–10 years.

In the kitchen

Kitchen sponge: every 1–2 weeks (they harbor a surprising amount of bacteria). Cutting boards: when deep grooves appear that trap food. Plastic food containers: when warped, stained, or cracked. Spices: ground spices lose potency after 1–2 years.

In the bathroom

Toothbrush (or head): every 3–4 months, or after illness. Towels: every 2–3 years — they stop absorbing and hold odor. Loofahs: natural ones monthly; plastic ones every couple of months.

Safety items you shouldn't forget

Don't skip these: smoke & carbon-monoxide detectors last about 10 years (check the date on the back), fire extinguishers have expiry dates, and running shoes lose support after roughly 300–500 miles — worth knowing if your knees ache.
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A simple habit

You don't need to track all of this. Once or twice a year, do a quick sweep — pillows, sponge, toothbrush, detector batteries — and replace what's due. Small refreshes make a home feel noticeably better.

Frequently asked questions

How often should you replace a mattress? +
Most mattresses last 7 to 10 years. Replace sooner if you regularly wake up stiff or sore, or if it sags visibly.
How often should you replace a kitchen sponge? +
Every one to two weeks. Sponges harbor bacteria quickly; sanitizing helps, but frequent replacement is the safest habit.
When should you replace smoke detectors? +
Most smoke and carbon-monoxide detectors should be replaced about every 10 years. Check the manufacture date printed on the unit and test them monthly.