This is a good question—because it sounds like a “family laundry trick,” but the reality is more interesting.
Your father-in-law is referring to using Aspirin in laundry, which is an old home remedy some people used for whitening clothes or removing stains.
🧺 Does aspirin actually do anything in laundry?
✔ The idea behind it
Aspirin contains acetylsalicylic acid. In theory, people believed it could:
- Help break down stains
- Brighten whites slightly
- Act like a mild cleaning booster
❌ What science actually says
- There is no strong evidence that aspirin meaningfully improves laundry results
- Modern detergents are far more effective
- Any “whitening” effect is usually minimal or placebo-level
- It is not a standard or recommended laundry additive
⚠ Potential downsides
- Can leave residue if not fully dissolved
- Unnecessary chemical use in washing machines
- May damage fabrics over repeated use (mild acidity over time)
- Wastes medication that’s meant for health use, not cleaning
🧠 Why your mother-in-law might have done it
This is likely a traditional household habit, common in older home-care “hacks,” where people experimented with:
- Baking soda
- Vinegar
- Aspirin
- Bluing agents
Some of these worked reasonably well; others just became family traditions over time.
✔ What actually works better for whitening clothes
- Oxygen-based bleach (safer and more effective)
- Proper detergent + correct water temperature
- Sunlight drying (natural whitening effect)
Bottom line
Aspirin in laundry is an old folk trick with little real benefit today, not a necessary or proven method.
If you want, I can tell you which “old laundry hacks” actually still work—and which ones are just myths passed down through families.
