Cast Iron Legacy: Proper Cleaning Methods to Preserve Seasoning

Why Cast Iron Needs Extra Care

Cast iron cookware is more than just a pan—it’s a kitchen heirloom that can last for generations when cared for properly. Unlike stainless steel or non-stick pans, cast iron develops a natural non-stick surface known as seasoning. This layer, created by oils baked into the surface, not only enhances flavour but also protects the pan from rust.

The challenge? Cleaning cast iron skillets without stripping away that precious seasoning. Harsh chemicals, overly abrasive scrubbing, or fragranced detergents can undo years of care. That’s why choosing gentle, naturally derived cleaning products like those from Bio-D is essential for maintaining your cast iron the eco-friendly way.

In this blog, we’ll walk you through the proper steps for cleaning, restoring, and maintaining cast iron so your skillet remains a trusted part of your kitchen for decades.

Choosing the Right Cleaning Supplies

To keep your skillet in top condition, avoid bleach based detergents, harsh soaps, or steel wool that can scratch and damage the surface. Instead, gather:

• Bio-D Fragrance Free Washing Up Liquid – Perfect for cleaning without leaving scents or residues behind.
• A soft sponge or brush – Gentle enough to clean without stripping seasoning.
• Warm water – Helps loosen food particles naturally.
• A non-abrasive scraper (optional) – For tougher food bits.
• A clean tea towel or paper towel – For drying thoroughly.
• A small amount of vegetable oil – To finish with a protective layer.

With these eco-friendly tools, you’ll clean effectively while protecting both your cookware and the planet.

How to Clean a Cast Iron Skillet After Daily Use

1. Let the Pan Cool Slightly – Avoid shocking hot cast iron with cold water, which can cause cracks.
2. Rinse with Warm Water – Use a soft brush to remove food debris.
3. Apply Bio-D Fragrance Free Washing Up Liquid – Add a small amount to your sponge or brush. The fragrance-free formula ensures no scent lingers on the skillet surface.
4. Scrub Gently – Work on stubborn spots without resorting to abrasives.
5. Rinse Well – Ensure all soap is washed away to keep your skillet food-safe.
6. Dry Immediately – Pat dry with a towel and place on a low heat for a few minutes to evaporate moisture.
7. Oil Lightly – Rub a thin coat of oil into the surface with a paper towel. This maintains the seasoning and prevents rust.

By using Bio-D’s naturally derived washing up liquid, you avoid harsh chemicals while ensuring your cookware is safe for every meal.

Dealing with Stuck-On Food

Sometimes, food doesn’t come off easily, especially if something burns onto the surface. Here’s the best method:

• Soak the Skillet – Fill it with warm water and a few drops of Bio-D Fragrance Free Washing Up Liquid. Let it sit for 10–15 minutes.
• Gently Scrape Away Residue – Use a non-metallic scraper or spatula.
• Wash Again and Rinse Thoroughly – To ensure the surface is clean and residue-free.
• Dry and Oil – As always, finish by drying and lightly oiling.

This approach ensures burnt-on food comes off without damaging seasoning or introducing synthetic residues into your cooking.

Restoring a Neglected or Rusty Pan

Even if your cast iron has been forgotten in a cupboard or shows signs of rust, don’t despair, it can almost always be revived:

1. Scrub Off Rust – Use a gentle scrubber or fine steel wool if necessary.
2. Wash with Bio-D Washing Up Liquid – To remove rust dust and old residue.
3. Dry Completely – Moisture is the biggest enemy of cast iron.
4. Re-season the Pan – Apply a thin coat of vegetable oil across the entire surface and bake upside down in the oven at 180°C for an hour. Allow to cool slowly.

This process restores your skillet, bringing it back to life without harsh chemicals.

Troubleshooting Common Cast Iron Issues

• Food Sticking? – Your seasoning may need reinforcing. Cook naturally oily foods like fried potatoes, aubergine, or mushrooms to help build layers.
• Rust Spots? – Scrub gently, wash, dry, and apply oil straight away.
• Metallic Taste? – This indicates insufficient seasoning. Re-season the pan in the oven.
• Sticky or Gummy Surface? – Too much oil was applied after cleaning. Use less oil and heat the skillet longer when seasoning.

Maintaining Seasoning for the Long Term

The secret to a well-seasoned skillet is regular use. Cooking naturally contributes to the seasoning process, especially when using oils. To keep your pan in prime condition:

• Avoid prolonged soaking except when absolutely necessary.
• Always dry and oil immediately after washing.
• Store in a dry place to prevent rust.
• Cook with a variety of oils and fats to strengthen the non-stick surface.

Every time you use your Bio-D Fragrance Free Washing Up Liquid, you’re protecting not only your cast iron but also your household from unnecessary synthetic chemicals.

Why Choose Bio-D for Cast Iron Care?

At Bio-D, we believe that effective cleaning doesn’t have to come at the expense of your health or the environment. Our plant-based, biodegradable products are tough on grease yet gentle enough for the most sensitive cookware. By choosing Bio-D, you’re making a conscious choice for:

• Sustainability – All products are made from naturally derived ingredients.
• Safety – Fragrance free options protect against lingering scents and residues.
• Performance – Proven cleaning power without harsh chemicals.

Whether you’re maintaining a treasured cast iron skillet or simply washing up after dinner, Bio-D provides the perfect balance of effectiveness and eco-responsibility.

Knowing how to clean a cast iron skillet properly is the key to preserving its legendary cooking qualities. By using Bio-D’s Fragrance Free Washing Up Liquid, you can keep your cast iron clean, safe, and seasoned, without compromising on natural, eco-friendly cleaning.

Take care of your cookware, and it will take care of you for a lifetime.