After my mother-in-law passed away, I started helping my father-in-law with laundry and other chores. He asks me to add aspirin to the washing machine every time I do the laundry. When I asked him why, he said that’s how his wife used to do it. Any idea what aspirin does?

That’s actually an old-school laundry trick—your father-in-law likely learned it from experience rather than science 😊

💊 Why people used Aspirin in laundry

Years ago, some people added aspirin because they believed it could:

👕 1. Help Whiten Clothes

Aspirin contains mild acidic compounds
These can help break down sweat stains and yellowing, especially on white fabrics

💧 2. Loosen Stains

It may help dissolve certain body oils and residues
Particularly useful for collar or underarm stains

🧼 3. Act as a Gentle Cleaning Booster

Before modern detergents improved, small hacks like this were used to enhance cleaning power

⚠️ Does It Actually Work Today?

Partially, but not necessary
Modern detergents are much more effective than what people had decades ago
Aspirin is not a replacement for stain removers or bleach

🚫 Things to Keep in Mind

Colored coatings on some aspirin tablets can leave marks
It won’t disinfect or deep-clean like proper laundry products
Using too much may leave residue

🌟 Bottom Line

Adding aspirin to laundry is a traditional trick for whitening and stain removal, but today it’s mostly outdated. It might help a little—but modern detergents do the job much better.

It’s actually kind of touching—this sounds like one of those habits tied to memory and routine. If you want, I can suggest a modern equivalent that works even better while keeping his routine familiar.