Putting an Empty Plastic Bottle in the Washing Machine: A Clever Laundry Hack or Just a Myth?

From time to time, simple household hacks go viral on social media, promising to save time, improve cleaning, or even extend the life of your appliances. One of the latest trends suggests placing an empty plastic bottle inside your washing machine during a wash cycle. According to many online posts, this trick can make clothes cleaner, reduce wrinkles, save water, and even improve washing performance.

But does this unusual laundry hack actually work? Or is it just another internet myth?

Let's take a closer look at what the evidence—and laundry experts—have to say.

Why Are People Putting a Plastic Bottle in the Washing Machine?

Supporters of this hack claim that an empty plastic bottle can:

• Improve water circulation.
• Help separate clothes during washing.
• Reduce wrinkles.
• Increase the movement of laundry inside the drum.
• Make detergent work more effectively.
• Speed up the washing process.

The idea is that the bottle bounces around inside the drum, creating extra movement that may prevent clothes from clumping together.

While this sounds logical, there is very little scientific evidence to support these claims.

Does It Actually Make Clothes Cleaner?

Modern washing machines are already designed to provide effective agitation and water circulation.

Front-loading and top-loading machines use carefully engineered drum movements to:

• Lift clothing.
• Rotate fabrics evenly.
• Allow detergent to penetrate fibers.
• Rinse away dirt and stains.

Adding a lightweight plastic bottle is unlikely to significantly improve this process.

If clothes aren't coming out clean, the cause is usually something else, such as:

• Overloading the machine.
• Using too much or too little detergent.
• Choosing the wrong wash cycle.
• Washing heavily soiled items together with lightly soiled clothing.

Improving these factors is far more effective than adding random objects to the drum.

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A front-loading washing machine filled correctly with clothes and the appropriate amount of detergent.

Could a Plastic Bottle Reduce Wrinkles?

Some users report fewer wrinkles after using this trick.

However, there is no reliable research showing that an empty plastic bottle consistently reduces fabric wrinkling.

Wrinkles are more strongly influenced by:

• Spin speed.
• Fabric type.
• Load size.
• Removing clothes promptly after washing.
• Proper drying techniques.

To reduce wrinkles naturally:

• Avoid overloading the washer.
• Select the appropriate cycle.
• Shake garments before hanging or drying.
• Fold or hang clothes immediately after drying.

Can It Damage the Washing Machine?

This is one of the biggest concerns.

A lightweight plastic bottle may seem harmless, but it can:

• Strike the drum repeatedly.
• Become lodged between clothing.
• Create unnecessary noise.
• Increase wear on delicate garments.
• Potentially interfere with the washing cycle if the bottle becomes trapped.

Although occasional use is unlikely to damage a sturdy washing machine, manufacturers generally do not recommend placing unnecessary objects inside the drum.

Following the appliance manufacturer's instructions is always the safest approach.

Why This Trick Became Popular

Many viral household hacks spread because they are:

• Easy to try.
• Inexpensive.
• Visually satisfying.
• Based on personal anecdotes.

However, personal experiences do not always reflect how something works under controlled conditions.

Without consistent testing, it's difficult to know whether the perceived benefits come from the bottle itself or from other changes, such as using a smaller laundry load or a different wash cycle.

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A person reading the washing machine's user manual before starting a load.

Laundry Habits That Really Improve Cleaning

Instead of relying on unproven internet hacks, consider these evidence-based laundry practices:

1. Don't Overload the Machine

Overstuffing prevents clothes from moving freely.

Leave enough space for water and detergent to circulate effectively.

2. Use the Right Amount of Detergent

Too much detergent can leave residue on clothing.

Too little may not remove dirt effectively.

Follow the detergent manufacturer's recommendations based on:

• Load size.
• Water hardness.
• Soil level.

3. Sort Laundry Properly

Separate clothing by:

• Color
• Fabric type
• Soil level

This helps improve washing performance while protecting delicate fabrics.

4. Choose the Correct Water Temperature

Different fabrics require different temperatures.

For example:

• Cold water helps preserve colors.
• Warm water removes everyday dirt effectively.
• Hot water may be appropriate for heavily soiled items when fabric care labels allow.

Always check garment care instructions first.

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A neatly organized laundry basket sorted into whites, colors, towels, and delicate fabrics.

5. Clean Your Washing Machine Regularly

Even washing machines need cleaning.

Over time, detergent residue, fabric softener, and moisture can lead to:

• Unpleasant odors.
• Mold growth.
• Reduced cleaning performance.

Many manufacturers recommend periodically running a maintenance cycle using an approved washing machine cleaner.

Also remember to:

• Clean the detergent drawer.
• Wipe the door seal.
• Leave the door slightly open after washing to allow the drum to dry.

Other Popular Laundry Myths

Several laundry hacks have circulated online over the years, including:

• Adding aspirin to whiten clothes.
• Using excessive vinegar in every wash.
• Washing everything in hot water.
• Using much more detergent for extra cleaning.

While some tips have limited uses, others may reduce cleaning performance or even damage fabrics and appliance components if used excessively.

It's always best to rely on recommendations from your washing machine manufacturer and fabric care labels.

When Should You Be Concerned About Washing Performance?

If your clothes consistently come out:

• Dirty
• Smelly
• Covered in detergent residue
• Excessively wet
• Damaged

the problem is more likely related to:

• Machine maintenance.
• Incorrect detergent use.
• Mechanical issues.
• Overloading.
• Incorrect cycle selection.

If problems continue despite proper use, it may be time to have the appliance inspected.

Image Suggestion

A technician performing routine maintenance on a front-loading washing machine.

The Bottom Line

Putting an empty plastic bottle inside your washing machine is an interesting internet hack, but there is no strong evidence that it significantly improves washing performance, reduces wrinkles, or cleans clothes better than the machine is already designed to do. In some cases, introducing loose objects into the drum could create unnecessary noise or increase wear on fabrics and the appliance.

The most effective ways to achieve cleaner laundry remain simple and well-established: avoid overloading the washer, use the correct amount of detergent, choose the right wash cycle, sort clothes appropriately, and clean your washing machine regularly.

Rather than relying on viral tricks, following the manufacturer's instructions and practicing good laundry habits will provide the safest and most consistent results. Sometimes the smartest laundry hack is simply using your washing machine the way it was designed to be used.