How to Clean a Cast Iron Skillet — Toronto Home Guide

Cast iron skillets require a different approach than regular pans — soap, soaking, and air drying all damage the seasoning. Proper cleaning takes about two minutes and extends the life of the pan indefinitely.

After Every Use — Standard Clean

1. While the pan is still warm (not scorching hot), rinse under warm water
2. Use a stiff brush or pan scraper to remove food particles — no need for soap in most cases
3. If needed, use a small amount of dish soap and scrub — contrary to popular belief, a little soap occasionally is fine; it's prolonged soaking that damages seasoning
4. Rinse thoroughly
5. Return to the stove over medium-low heat for 2–3 minutes to evaporate all moisture — a wet cast iron pan will rust within hours
6. Remove from heat and immediately apply a thin layer of cooking oil (flaxseed, vegetable, or canola) with a paper towel — rub it in, then buff away the excess so the pan is barely shiny, not wet
7. Store in a dry location

Removing Stuck Food

For seriously stuck food after cooking:

1. Add a small amount of water to the pan while still warm and return to the stove
2. Bring to a simmer — the steam loosens stuck bits
3. Use a wooden spoon or pan scraper to lift the residue
4. Discard the water and proceed with the standard clean above

Alternatively, pour coarse salt into the pan and use a folded paper towel to scrub in a circular motion — the salt acts as an abrasive without damaging seasoning.

Re-seasoning if Damaged

If the pan develops rust spots or sticky patches:

1. Scrub with steel wool or a chain mail scrubber until the rust is completely gone
2. Wash with soap and rinse
3. Dry completely on the stove over heat
4. Apply a thin layer of flaxseed or vegetable oil all over the pan — inside, outside, and handle
5. Place upside down in a 200°C (400°F) oven for one hour
6. Turn off oven and let cool inside the oven
7. Repeat 3–4 times to rebuild a solid seasoning base

Key Mistakes to Avoid

• Never soak cast iron in water — even 20 minutes causes rust
• Never put in the dishwasher
• Never let air dry — always dry on the stove with heat
• Never apply too much oil — the excess turns sticky and gummy; always buff to a bare shine