How to Clean Stainless Steel Cookware [1]

스테인리스 스틸 조리도구 세척 방법

Stainless steel cookware is not as difficult to care for as many people think.

Once you understand what causes rainbow marks, white water spots and polishing residue, keeping your cookware clean becomes much easier.

Stainless steel cookware often has a reputation for being beautiful, durable and a little intimidating at first.
Beautiful? Yes.
Durable? Absolutely.
A little intimidating at first? Also YES.

When people use stainless steel cookware for the first time, two worries usually come up.
Does food really stick that easily?
Will I need a whole weekend just to remove stains?
Thankfully, NO.

Most marks and stains on stainless steel cookware are not signs of damage. They are usually caused by heat, minerals in water, oil, food residue, salt, or simply the timing of cleaning. Once you understand what is happening, stainless steel pans and pots become much easier to care for than they first appear.

At Kopot, our basic care approach is simple.
Soften first, scrub less.
Use warm water, dish soap, vinegar and baking soda in the right situation.
Dry your cookware after washing.

Stainless steel does not need to be treated as delicately as nonstick cookware, but a few good habits will help keep the surface clean, bright and beautiful for years.

1. Everyday Cleaning After Cooking

For daily cleaning, you do not need anything complicated.
1) First, wipe away any leftover oil or food residue with a scraper or paper towel. Rinse the pan or pot with warm water, then wash it with dish soap and a soft sponge. Rinse thoroughly.
2) After washing, dry the cookware straight away with a clean cloth. This simple step helps prevent white water spots and cloudy marks from forming on the surface.
* One important note: avoid placing a very hot pan directly under cold water.

Stainless steel is strong, but sudden temperature changes can still put stress on the cookware and may cause warping, especially on the base. After cooking, let the pan cool slightly, then wash it with warm water.

A little patience here goes a long way. Your pan just finished cooking dinner, let it have a moment too.

2. How to Remove Polish Residue from New Stainless Steel Cookware

Before using new stainless steel cookware for the first time, it is important to clean it properly.

This step is especially relevant for new stainless steel items that have been finished with a standard polishing process. During manufacturing, the surface is polished to become smooth and refined, and invisible polishing residue may remain on the cookware.

For Kopot products, please note that this does not apply in the same way to our electropolished Diverse Pot, Flow Wok and Flow Frypan. These products go through a different finishing process.

The simplest method is to use cooking oil and baking soda.
A) Add a small amount of cooking oil to a paper towel and gently wipe the inside and outside of the cookware. If black or grey residue appears on the towel, this is normal.
B) Next, mix baking soda and cooking oil in a 1:1 ratio to create a soft paste. Gently rub the paste over the surface of the cookware.
C) Once the paste turns grey, wipe it off and dispose of it in the rubbish bin, as it may contribute to blocked drains.

Finally, wash the cookware thoroughly with dish soap and warm water, then dry it completely.

This deep first clean only needs to be done once. After that, your regular cleaning routine is enough.

3. Why Do Rainbow Marks Appear?

After using stainless steel cookware, you may notice rainbow coloured marks on the base of the pan. They can appear blue, purple, gold or slightly green.

At first glance, it may look like something has gone wrong. It has not.

Rainbow marks usually appear when the thin protective oxide layer on the surface of stainless steel changes slightly. This can happen after exposure to high heat, especially when an empty pan is heated for too long.

Minerals in water, salt or food residue can also contribute to these marks, especially when liquid evaporates and leaves a thin layer behind on the surface. The result is a light-reflecting effect that creates that familiar rainbow tint.

In most cases, these marks are cosmetic, not harmful, and they do not mean your cookware is damaged.

To remove them, pour a small amount of white vinegar into the pan. Gently rub the surface with a soft sponge or cloth. After a few minutes, the rainbow marks should begin to disappear. Rinse well with water, wash once more with dish soap, then dry thoroughly.

To reduce rainbow marks in the future, try cooking over medium heat rather than very high heat. Stainless steel conducts and holds heat well, so most everyday cooking does not need the highest setting. Also avoid letting salty water or mineral-rich water boil completely dry in the pan.

4. How to Remove White Water Spots

Sometimes, stainless steel cookware may develop white spots, cloudy patches or pale marks on the base. These are usually caused by minerals in water, salt or food residue left on the surface. They are common, especially if the cookware is left to air dry.

White vinegar is also helpful here.

Mix water and white vinegar in a 1:1 ratio. Pour enough of the mixture into the cookware to cover the stained area. Warm it over medium-low heat for about 5 minutes, then turn off the heat and let it cool slightly.

When the liquid is no longer too hot, gently scrub the surface with a soft sponge. Rinse with clean water, wash with dish soap, then dry immediately.

Drying your cookware after washing is one of the easiest ways to prevent these marks from coming back. A small habit, but a very useful one.

What Comes Next?

In the next post, we will look at what to do when food sticks to the pan, how to clean a burnt stainless steel pan, how to remove older brown stains, and a few cleaning myths that sound convincing but are not quite accurate.