Most people think laundry is straightforward: toss clothes into the washer, add detergent, press start, and wait. But according to many cleaning enthusiasts, a few simple tricks can make a surprising difference in how fresh, untangled, and evenly cleaned your clothes turn out.

One unusual laundry hack gaining attention online involves something nearly everyone already has at home — an empty plastic bottle.

At first, the idea sounds strange.

Why would anyone put a plastic bottle inside a washing machine?

Yet many people claim the trick actually helps solve one of the most annoying laundry problems: tangled, twisted clothing.

If you’ve ever pulled sheets, towels, or hoodies from the washer only to find them wrapped into tight knots, you already know the frustration. During the spin cycle, clothes move rapidly inside a small space, and larger fabrics often twist around smaller items.

The result can include:
Sheets twisted into heavy ropes
Sleeves tangled together
Towels bunched into tight balls
Clothes that remain partially dirty or difficult to dry

This happens because centrifugal force pushes fabrics tightly against the drum walls as the machine spins. Once certain items begin wrapping together, water and detergent may not circulate evenly through the load.

That’s where the plastic bottle trick comes in.

The method is simple:
Place one or two clean, empty plastic bottles into the washing machine alongside your laundry. Most people recommend standard 16–20 oz bottles with the caps tightly secured.

According to supporters of the hack, the bottles act as lightweight agitators during the wash cycle.

As the drum rotates, the bottles bounce around gently between fabrics, helping separate clothing and preventing large items from wrapping tightly together. This added movement may allow water and detergent to circulate more freely throughout the load.

In theory, the bottles interrupt the tight spinning motion that causes fabrics to knot together.

Some people say this results in:
Less tangled laundry
Better rinsing
More even washing
Shorter drying times

The trick appears especially popular for loads containing:
Bedsheets
Blankets
Large towels
Sweatshirts
Long pants

Many users also like the fact that it repurposes something that would otherwise end up in recycling or trash.

However, experts still recommend caution.

Hard plastic objects inside washing machines could potentially create noise, imbalance, or stress on certain machines if used improperly. Front-loading washers, in particular, may react differently than top-loading machines.

Anyone trying the trick should use lightweight bottles only and avoid overloading the machine.

It’s also important to make sure the bottle caps are secured tightly so water does not fill the bottles during the cycle.

While there is limited scientific research specifically studying this laundry method, the general principle behind it does make some practical sense. Additional movement inside the drum may help reduce the tight fabric compression that causes tangling.

Whether it becomes a long-term laundry solution probably depends on personal experience and washing machine type.

Still, the popularity of the trick highlights something many homeowners enjoy discovering:

Sometimes surprisingly simple household hacks can make everyday chores a little easier — using items people already have sitting around the house.