Yes, a household dryer on high heat kills ticks, and it does so quickly. Six minutes on high heat is enough to kill all life stages of blacklegged ticks on dry clothing, though the CDC recommends 10 minutes as a safety margin. The combination of extreme heat and bone-dry air inside a dryer is essentially the worst environment a tick can encounter.
Why Dryer Heat Is So Effective
Ticks are highly vulnerable to two things at once: heat and low humidity. A residential dryer on high heat reaches temperatures well above what any tick species can survive. Research on multiple tick species shows that upper lethal temperatures range from about 106°F to 117°F (41°C to 47°C), depending on the species. Blacklegged ticks (the primary carriers of Lyme disease) sit at the low end of that range, dying at around 106°F. A standard home dryer on high heat produces air temperatures of roughly 125°F to 135°F, far exceeding those thresholds.
The kill mechanism is twofold. At temperatures above about 113°F, proteins inside the tick’s cells begin to break down, a process called denaturation. At the same time, the dryer’s tumbling airflow strips moisture from the tick’s body at a rate it simply cannot compensate for. Ticks depend on absorbing water vapor from humid air to stay alive. In the parched interior of a running dryer, that lifeline disappears completely. Lab studies confirm that exposure to dry air is just as lethal as high temperature alone, and together they’re devastating.
How Long to Run the Dryer
A study published in Ticks and Tick-Borne Diseases found that all adult and nymphal blacklegged ticks died after just 4 minutes in a dryer on high heat with dry towels. With a 95% confidence interval, 6 minutes was sufficient. The CDC rounds this up to 10 minutes for dry clothing, which builds in a comfortable buffer for variations in dryer performance, load size, and clothing thickness.
The key word here is “dry.” If your clothes are already dry when you come inside, you can toss them straight into the dryer for 10 minutes and be confident any hitchhiking ticks are dead. This is actually the fastest and most reliable method, since it puts the tick into lethal conditions immediately.
What About Wet or Freshly Washed Clothes?
If your clothes are damp or you want to wash them first, the situation changes. Wet fabric absorbs heat and maintains humidity inside the drum, which delays the point at which conditions become lethal for ticks. The CDC notes that damp clothes need additional drying time beyond the 10-minute minimum, though no specific number is given. A full normal drying cycle (typically 40 to 60 minutes) on high heat will do the job.
Washing alone is surprisingly unreliable. Cold and warm water wash cycles do not consistently kill ticks. These animals can survive prolonged submersion, and the agitation of a washing machine isn’t enough to destroy them. If you need to wash clothes first, use hot water. But even then, the dryer is where the real killing happens. The most effective sequence is: wash on hot if needed, then dry on high heat for a full cycle.
The Dryer-First Strategy
Here’s a counterintuitive tip that many people miss. If your clothes aren’t visibly dirty and you just want to eliminate ticks, skip the washer entirely and put them in the dryer first. Running the dryer for 10 minutes on high heat with dry clothing is faster, uses less energy, and is more reliable than washing. You can always wash the clothes afterward if you want them clean.
This approach works because the dryer creates lethal conditions almost immediately when clothes go in dry. Adding water to the equation, whether from a wash cycle or from sweat-soaked clothing, only slows down how fast the temperature and dryness reach the point of no return for ticks. Think of it as: dry heat kills ticks, moisture protects them.
Does It Work on All Tick Species?
Different tick species have slightly different heat tolerances, but a household dryer overwhelms all of them. Blacklegged ticks (also called deer ticks) are the most heat-sensitive, with lethal temperatures starting around 106°F. Brown dog ticks are the hardiest, surviving up to about 117°F. Lone star ticks and American dog ticks fall somewhere in between. Since a dryer on high heat exceeds 125°F, it kills every common North American tick species with a wide margin to spare.
Life stage doesn’t meaningfully change the outcome either. Larvae, nymphs, and adults all die under dryer conditions. Nymphs are the life stage most likely to bite humans undetected (they’re roughly the size of a poppy seed), and the research confirming the 4-to-6-minute kill time specifically tested nymphs alongside adults.
What About Low or Medium Heat?
The research and CDC guidance both specify high heat. Low heat settings on most dryers produce temperatures in the range of 125°F or below, which gets uncomfortably close to the survival threshold of hardier tick species. Medium heat is likely sufficient but hasn’t been as rigorously tested. If your goal is certainty, use high heat. If a garment’s care label says no high heat, running a longer cycle on medium is a reasonable compromise, though it’s not officially recommended.
Air-drying clothes on a clothesline or drying rack does not reliably kill ticks. Even on a hot summer day, ambient temperatures and humidity levels are unlikely to reach the sustained extremes a tick can’t tolerate. A tick clinging to a shirt on a clothesline can simply wait it out.
Putting It Into Practice
After spending time in tick habitat (wooded areas, tall grass, leaf litter), strip your clothes off before or immediately after entering your home. Place them directly into the dryer on high heat for at least 10 minutes. Check your body for ticks separately, since the dryer only handles what’s on your clothing. Pay attention to hidden spots: behind the ears, along the hairline, under arms, behind knees, and around the waistband.
If clothes are sweaty or rain-soaked, either dry them on high for a full cycle or wash on hot first and then dry on high for a full cycle. Don’t assume that tossing damp clothes in for 10 minutes is enough. The moisture buys the tick time, and even a few hours of access to humid air can significantly improve a tick’s survival odds.