The hidden danger of overdrying your clothes

Pulling a load of laundry out of the dryer that’s hot enough to bake a pizza may feel cozy on a winter day, but it’s actually bad for your clothes. If your fabrics are bone-dry at the end of a dryer cycle, you might be shortening the lifespan of your wardrobe.

But don’t worry, because most modern dryers are smart enough to prevent exactly this kind of damage—if you let them. Here’s what you need to know to get your clothes sufficiently dry without fail, and without harm.

Aren’t dryers supposed to be hot?

Yes, traditional dryers get hot. Dryers work by pulling air in, heating it, and tumbling wet clothes through the warm air. Most dryers remove moisture by venting it to the outside. (Note: Condenser dryers, an alternative method, use minimal heat and rely on evaporation.)

The best dryers can dry your clothes quickly at a hot temperature, but not so hot that it scorches or damages them. Generally, you don’t want a dryer to go over 150°F, even on the highest setting. North of that temperature, you’re setting the conditions for fabric damage.

In lab tests we've run, we measured peak dryer temperatures ranging from 106°F to 188°F. While the outliers are rare, they do exist. And understanding how a modern dryer works can save you hassle and money.

Trust your sensors: Why modern dryers are smarter than you think

For decades, the automatic dryer was a simple and blunt instrument. They relied on manual timers that blasted heat until the bell rang, regardless of how dry the load actually was. Fortunately, it coincided with a time when clothes were generally of a higher quality, both in fabric and stitching, so our wardrobes tolerated it better. Over the last few decades, the rise of fast fashion has downgraded the quality of everyday apparel. Fortunately, during that same time, dryers have skewed in the other direction, becoming smarter and gentler to compensate.

Modern dryers are almost always outfitted with moisture sensors that detect precisely when a laundry load is dry. Some models can even detect the type of fabric, and some can communicate with the washing machine so they know what the incoming load is and how much water needs to be removed before it even starts.

But even with all that innovation, many consumers still default to "Timed Dry" or "Heavy Duty" cycles out of habit. We recommend that you stop fighting the machine and trust the Less Dry or Normal settings. These are specifically calibrated to stop the cycle before the fabric enters the danger zone

Sort your laundry by weight to prevent shrinking

One of the most common causes of overdrying clothes is "mixed-weight" loads. When you toss in heavy denim jeans with thin polyester t-shirts, the dryer’s sensors may keep the cycle running until the thickest item is dry. By the time those jeans are ready, your t-shirts have been subjected to 20 minutes of excessive heat they didn't need.

To prevent shrinking, sort your laundry by fabric weight rather than just color. Keep your towels with your towels and your delicates with your delicates. This allows the moisture sensor to accurately trip the "off" switch the moment the entire load reaches the target humidity level, protecting your lighter garments from unnecessary heat exposure.

The "damp dry" strategy for longevity

The best way to avoid the pitfalls of overdrying clothes is to stop the cycle before it reaches 100% dry. We recommend pulling clothes out while they still have a hint of "coolness" or very slight dampness. Some dryers even have a "Damp Alert" specifically for this purpose.

Allow the items to air-dry the rest of the way in a basket, on a hanger, or right in the drawer.

Stop using dryer sheets

It’s time to break the dryer sheet habit. For one thing, they’re gross. They leave a perfumey film on all those clean clothes you just took out of the washer. But they can also lead to a less efficient dryer.

Over time, that film builds up and can coat your dryer’s moisture sensor, essentially "blinding" it. When sensors are covered in film, they can't accurately detect moisture, which often causes the dryer to run significantly longer than necessary, leading to—you guessed it—overdrying.

Heat pump and ventless dryers: The gentle alternative

Vented dryers are the standard in the U.S. Not sure which type you have? If it has a big metal tube coming out the back and running to an exterior wall of your house, that’s a vented dryer. But there are other models that work differently.

Ventless dryers come in two varieties: condenser and heat pump. Neither requires venting to the outside, so they’re great for places where a dryer might not easily fit. Condenser dryers have been around for decades, with a reputation for being highly energy efficient… and incredibly slow.

Heat pump dryers are the new, much-improved ventless dryer technology—faster and more effective at drying.

We mention them here, in the context of overdrying, because ventless dryers use far lower heat than vented dryers, so they’re gentler on your clothes. And while they’ve been slow to catch on in the U.S., improved technology and a shift towards small space living have driven growth.

The verdict: Keep it cool to keep it new

Excessive heat from your dryer is a hazard, but one that can be prevented. By trusting your machine’s sensors, sorting by weight, and ditching the waxy dryer sheets, you can significantly extend the life of your wardrobe.

Follow those tips—plus, remember to clean your lint trap after every cycle and to clean your dryer vent yearly—and your clothes will thank you.

FAQ: Your shrinking questions answered

• What does overdrying do to clothes? It causes "fiber shedding" (lint), weakens the structural integrity of the fabric, and leads to permanent shrinkage and static cling.
• Does cotton shrink in the dryer? Yes. Cotton is a natural fiber that is prone to relaxation shrinkage when exposed to high heat and agitation.
• Does linen shrink in the dryer? Absolutely. Linen is even more heat-sensitive than cotton and should ideally be air-dried or tumbled on the lowest heat setting possible.
• Does hot water shrink clothes? Yes, heat from the washer can be just as damaging. Hot water can relax the tension in the fibers, which then contract during the drying process.
• What is the "Damp Dry" setting for? It's designed to stop the dryer when clothes are about 80-90% dry, which is the ideal time to remove items to prevent wrinkles and heat damage.
• Is "Auto Dry" better than "Timed Dry"? Almost always. Auto Dry uses sensors to detect moisture, whereas Timed Dry will continue to heat the drum even if the clothes are already scorched.