How to Remove Set-In Grease from a Cotton T-Shirt

Set-in grease on a cotton t-shirt can look like a permanent dark spot, but you can often lift it with dish soap and baking soda. This guide walks you through a safe, step-by-step method for treating an old grease stain on cotton, plus what to avoid and when to stop.

Why Set-In Grease Is Tricky

Grease is oily, and once it dries, it can bond to the cotton fibers. Heat from a dryer can make it even harder to remove. The key is to break down the oil with a degreasing agent, then absorb it with a powder like baking soda.

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What to Do First

Before you start, check the care label on your t-shirt. Cotton is durable, but it can shrink or fade if treated with hot water or harsh chemicals. If the label says dry clean only, take the shirt to a professional instead of trying home methods.

If the stain is old and set in, do not rub it. Rubbing can push the grease deeper into the fabric. Instead, work gently and blot.