6 Items You Should Never Keep Under Your Kitchen Sink
The cabinet under your kitchen sink seems like bonus storage, but it’s home to pipes and fittings that can sweat, drip, or fail, soaking whatever you stash there. Persistent humidity invites mold and warps packaging, and the space sits at floor level, which is prime territory for curious kids and pets to explore.
It's a high-risk, low-visibility zone. If you must use it, stick to hardy basics like dish soap, dishwasher tablets, and garbage bags. Here's what items are not included in those basics.
Cleaning sponges and scrubbers
Sponges and scrubbers thrive on staying dry between uses, but the under-sink cabinet is a damp, dark microclimate. Tuck them down there and they’ll absorb ambient moisture, fostering funky odors and bacteria growth long before their scrubbing power wears out.
Instead, let them air-dry on a sink caddy or well-ventilated holder, and rotate or sanitize regularly. Keeping them out in the open helps them last longer and keeps that hidden cabinet from becoming a petri dish.
Strong chemical cleaners and corrosives
Bleach, drain openers, and other corrosive cleaners don’t belong beneath the sink. Moisture can seep into unsealed containers, diluting formulas and reducing effectiveness, and the ground-level location makes them too accessible to children and pets.
Choose a secure, well-ventilated storage spot below eye level such as a locking cabinet or pantry shelf and keep lids tight.
Paper towel rolls and other paper goods
Paper towels and other paper goods are built to soak up liquid which is exactly why they fare so poorly under a sink. Even ambient dampness can wick into the roll, promoting mold and musty smells and forcing you to toss money in the trash.
Keep paper products in a cool, dry spot instead, away from plumbing and steam.
Flammable items like aerosol cans
Aerosol cans and other flammables should steer clear of the sink base especially if you have a garbage disposal. Disposals can generate heat during use, and trapped warmth in a tight cabinet raises pressure inside aerosol cans, creating a risk of explosion and fire.
Store flammable materials well away from heat sources and direct sunlight, such as in a dark cabinet or on a lower shelf in the garage, and always keep safety caps in tact.
Small electric kitchen gadgets
Small electric kitchen gadgets (think blenders, hand mixers, handheld vacuums, etc) are vulnerable to the very thing that lurks under your sink: water. A minor drip can seep into vents, short circuit boards, and quietly kill a motor long before you plug it in again.
Stash appliances on shelves or in a pantry where they stay clean, dry, and easy to reach. You’ll preserve warranties, avoid surprise failures, and keep that cramped cabinet for items that can actually survive a splash.
Dry pet food and treats
Dry pet food and treats seem hardy, but a damp cabinet can spell trouble. If packaging wicks moisture, kibble can develop mold that makes pets sick and the smell can attract pests.
Keep food in a secure, dry location like a pantry, ideally sealed in an airtight bin inside its original bag. This protects freshness, blocks humidity, and helps you spot any issues quickly without rooting around beneath the sink.