Don't Throw Away Rusty Pots! Try the Ketchup Hack

Before you throw away a rusty stainless steel pot, try tomato ketchup. The citric acid from tomatoes and the acetic acid from vinegar in ketchup can help break down light rust and water stains, and its thick texture keeps those acids in contact with the metal. Spread it on thickly, wait 30 minutes to an hour, then scrub gently and rinse.

It's a familiar frustration: blackish-red rust or water stains creep up around expensive stainless steel pots, pans, or the kitchen sink faucet. You scrub with a sponge until your arms ache, the stain doesn't budge, and you're left with ugly scratches on the surface. A pot forgotten in the back of a cupboard, with rust around the bottom and the handle joints, can look ready for the trash. That's where this odd rust removal hack, popular on YouTube Shorts, comes in—using the ketchup sitting in the fridge door near its expiration date.

Using an edible condiment to remove rust sounds like a joke. But if the pot was headed for the bin anyway and the expiring ketchup needs using up, there's little to lose by trying.

How Do You Remove Rust with Ketchup?

You need only three things: ketchup, an old toothbrush, and a soft sponge (or cloth). The method is simple enough to explain in three steps.

Step 1: Apply Ketchup Generously to Rusty Areas Squeeze a generous amount of ketchup onto the rusty or stained surface of the pot. Don't spread it too thin; the key is to cover it thickly, as if you're putting a mask pack on it. Using an old toothbrush to work it evenly into every nook and cranny helps even more.

Step 2: Leave It and Be Patient (Most Important!) Leave the ketchup as it is. Depending on how bad the rust is, 30 minutes to an hour is a good window; stubborn rust calls for the longer end. This waiting time is when the acids do their work.

Step 3: Gently Scrub and Wipe Away After the time has passed, the ketchup will have dried a little. Gently scrub the rusty area with a soft sponge, an old cloth, or the toothbrush you used earlier. There's no need to scrub hard—loosened rust can come away with the ketchup. Finally, rinse it clean with lukewarm water, and you're done!

What Results Can You Expect?

With light to moderate rust, the pot can come out noticeably brighter, with red rust lifted from the corners of the handle and a shine much closer to new. Results depend on how deep the rust goes, but it's a gentler first step than scrubbing with a steel wool pad while enduring the smell of harsh chemicals.

Why Does Ketchup Remove Rust?

Ketchup works because it is mildly acidic, and there's solid chemistry behind it.

• Lycopene and Citric Acid in Tomatoes: Tomatoes are rich in an antioxidant called 'lycopene' along with organic acids like citric acid.
• Acetic Acid in Vinegar: Vinegar is added to ketchup to give it that tangy flavor, and the 'acetic acid' in vinegar is also an acidic substance.

When the acidic components of the tomatoes and the vinegar combine, they help break down and gently dissolve the oxidized material (rust) on the metal surface, so the ketchup acts like a mild rust remover. Its thick, viscous texture also lets it cling to vertical walls and curved pot surfaces, keeping the acids in contact with the rust for a long time. Plain vinegar sprayed on a surface drips off quickly; ketchup makes up for that shortcoming as a natural rust removal pack.

Where Else Can You Use the Ketchup Hack?

Ketchup can also help on other metal surfaces around the house.

• Water-Stained Bathroom Faucets: If a showerhead or bathroom sink faucet has white water stains and has lost its shine, apply ketchup, wait 30 minutes, and rinse. It can bring back much of that hotel-bathroom sparkle.
• Tarnished Silver Accessories: Tarnished, blackened silver rings or necklaces may regain their shine if you soak them in ketchup for about 10 minutes and then wipe them with a soft cloth. (Be careful with accessories that have cubic zirconias or gems embedded!)
• Removing Rust from Bike Chains or Tools: Ketchup can also be applied to rusty bike chains or tools like pliers that have been left on the balcony for a long time.

So if you have ketchup that has passed its expiration date or is just taking up space in the fridge, don't throw it away yet. It can double as an eco-friendly all-purpose cleaner. Look around your kitchen or bathroom, and if you spot a dull metal surface, give the ketchup trick a try.