Cast iron skillet owners destroy their seasoning using this dish soap

The Myth of Modern Dish Soap

For generations, the golden rule of cast iron care was simple: never use soap. Then came the modern culinary revelation. Experts assured us that today’s dish soaps are mild and lack the harsh lye of the past, giving us the green light to suds up our prized skillets.

But there is a massive catch that is ruining pans in kitchens coast-to-coast across Canada. While lye is gone, a new, aggressively efficient ingredient has taken its place—and it is absolutely devastating to cast iron seasoning.

The Hidden Culprit: Citrus Degreasers

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If your go-to dish soap promises the grease-cutting power of citrus or boasts a fresh orange, lemon, or grapefruit scent, you need to keep it far away from your cast iron skillet. The secret weapon in these soaps is often d-limonene or high concentrations of citric acid.

Here is the problem: your cast iron’s non-stick seasoning is essentially layers of baked-on, polymerized oil. What are citrus degreasers biologically engineered to destroy? Oil and baked-on grease.

Why It Ruins Your Pan

When you scrub your skillet with a citrus-infused dish liquid, the acidic degreasers do not differentiate between leftover bacon fat and the hard-earned polymerized layers you have spent years building. With just a few washes, the citrus extracts eat through the protective coating, leaving your pan vulnerable to the elements.

Signs You Have Stripped Your Seasoning

• The Matte Gray Look: A healthy cast iron skillet should be glossy and pitch black. If yours looks dull or grayish, the seasoning is gone.
• Instant Flash Rust: If you notice a faint orange hue forming as soon as the pan dries, bare iron has been exposed to the humid Canadian air.
• The Sticking Point: Eggs that used to slide right out are suddenly cementing themselves to the bottom of the pan.

How to Wash Cast Iron Safely

You do not have to revert to the never wash it days of the past, but you do need to be selective. If you insist on using soap, check the label carefully. Opt for an ultra-mild, unscented, non-citrus dish soap. Better yet, stick to the tried-and-true method for stubborn stuck-on food: a handful of coarse kosher salt and a few drops of warm water, scrubbed with a stiff brush.

Save the lemon-scented heavy-duty soap for your stainless steel pots and plastic containers. Your cast iron will thank you with a lifetime of perfectly seared steaks and effortless slide-off-the-pan breakfasts.