How to Wash Laundry Infested With Head Lice

Head lice are a household problem that shows up in the laundry basket long before it shows up in a doctor’s office. Eggs, nymphs, and adult lice cling to bedding, towels, hats, and the clothes worn during the previous week, so eradicating an infestation means treating fabric, not just hair. Heat is the dependable weapon: temperatures above 122 degrees Fahrenheit kill head lice, most home water heaters are set to around 130 degrees, and clothes dryers reach 135 to 150 degrees. A hot wash followed by a high-heat drying cycle clears infested fabric in roughly 90 minutes at no chemical cost. Fabric care follows the same principle whether the enemy is mold or lice, and a separate walkthrough of removing mold from clothes covers the mildew side of that equation while this article focuses on the pest side.

Step-by-Step Laundry Instructions

Start by clearing a sorting area near the washer so infested items do not travel through the rest of the house. Use a plastic basket or a lined trash can instead of a cloth hamper, because cloth can hold eggs that a wash cycle never reaches. Keep the sorting bins on a washable surface, since hot water and detergent splashes will hit the floor around the machine. If that floor already carries residue from candles, polish, or spilled products, the process for removing wax from hardwood floors shows how to lift it without dulling the finish.

Why Heat Kills Lice

Head lice are exothermic insects whose body temperature tracks the environment, and they die when the surrounding temperature climbs beyond what their biology tolerates. The lethal threshold sits at 122 degrees Fahrenheit, and the safety margin matters. Lice eggs tolerate slightly more heat than adults, so the 125-degree target recommended for laundry leaves a cushion that kills live insects and nits in the same cycle. A single pass at these temperatures interrupts the reproductive cycle, because dead eggs cannot produce the nymphs that would hatch a week later.

Water and Dryer Temperature Targets

Home water heaters are typically set near 130 degrees Fahrenheit, which clears the 122-degree kill threshold, and dryers cycle between 135 and 150 degrees, which clears it with room to spare. The table below summarizes the targets and where each number comes from.

Which Items to Include

Wash anything that touched the infested person’s head or shared their sleeping space:

• Pillowcases, sheets, and mattress pads
• Towels, washcloths, and bathrobes
• Hats, scarves, hooded jackets, and collared shirts
• Stuffed animals, couch cushions, and throw blankets
• Headbands, hair ties, and fabric hair accessories

Items that cannot be washed, such as a cherished stuffed toy, move to the quarantine method described in the storage section below.

Treating Stains After the Wash Cycle

The hot-water wash kills lice, but it can also set stains that were already sitting in the fabric. Treat marks after the cycle so the treatment chemicals do not react with heat and make the stain permanent. Check each item’s care label first, because wool, silk, and some synthetics will not tolerate a 125-degree wash; those pieces get spot treatment and a separate cleaning path.

Stain Treatment Order

Work through stains in a fixed order so the treatment stays consistent across the load:

1. Sort the clean laundry and identify stains while the fabric is still damp, when most treatments work best.
2. Apply stain remover or a little liquid detergent directly to the mark and let it sit for 10 to 15 minutes.
3. Rewash the item in the hottest water the care label allows and add a second rinse.
4. Check the stain before drying; dryer heat sets whatever remains, so repeat the treatment if needed.

Protein-based marks like blood and sweat respond to cold water first, while oil-based stains need detergent to break them down before any heat is applied.

Air-Drying Delicates

Not everything survives a hot dryer cycle. Wool sweaters, silk scarves, and synthetic blends can shrink or melt at 135 degrees, so they air-dry after the wash. Delicates and stain-treated items that cannot take machine heat can hang instead, and a DIY clothes rack sized to your laundry space keeps them off the floor and out of drawers until the treatment cycle is complete.

Choosing a Drying Location

Pick a spot with good airflow and direct sunlight when possible. Sunlight adds ultraviolet exposure that helps degrade any eggs the wash missed, and circulating air shortens drying time so damp fabric does not turn into a mildew breeding surface while you wait.

Storing and Quarantining Items That Can’t Be Washed

Some items cannot go in the washing machine at all: leather jackets, felt hats, electronics, books, and delicate toys. They do not need to be thrown away. Head lice cannot survive more than about 48 hours away from a human host, so a short quarantine in a sealed container clears them without chemicals or heat.

Sealed Storage Method

1. Place each item in its own plastic bag and squeeze out the air before sealing.
2. Label the bag with the date and the item name so you know when the quarantine ends.
3. Store the bags in a closet, garage, or basement away from daily use.
4. Wait 48 hours, then remove the items, brush or vacuum them, and return them to use.

Do not skip the brush-down after quarantine; dead eggs and shed casings can remain in the fabric even when the lice are gone.

Handling Furniture and Bedding

Quarantine work often starts by pulling fabric covers off headboards, sofa cushions, and mattresses, which means removing hardware. A screw that strips mid-job stalls the whole cleanup while covers sit half-off. The guide to removing stripped screws covers extraction and replacement techniques that keep furniture assembly intact, so the frame goes back together before the clean covers do.

How Often to Wash and When to Retreat

Wash all infested laundry on the day you discover the infestation, then repeat the cycle over the following days as eggs hatch. A single wash kills the lice and nits present in the fabric, but it does not protect against a person who is still under treatment. If someone in the house still has live lice on their scalp, bedding can become re-infested within one night.

Wash Frequency by Item

High-touch items need the most frequent washing:

• Pillowcases and sheets: wash daily or every other day during treatment
• Towels and washcloths: wash after every use
• Hats, scarves, and hair accessories: wash after each wear
• Blankets and stuffed animals: wash or quarantine every two to three days

Items that touched the infested person only briefly, like a coat worn once, can move straight to the quarantine method instead of repeated washing.

Retreatment Schedule

Check every household member’s scalp every two to three days during treatment and keep the laundry cycle running until no live lice or new eggs appear for two weeks. The dryer does heavy work in this period: repeated hot cycles at 135 degrees or higher place steady load on the machine. Before committing to that schedule, confirm the power setup is sound, because the wiring comparison of three-wire versus four-wire dryer systems explains the differences between older and modern hookups plus the safe conversion methods for homes still on the older standard.

Cleaning the Home Beyond the Laundry

The laundry basket holds the worst of the infestation, but lice and nits can also land on furniture, floors, and carpets when people brush against them. A focused cleanup of the rooms where the infested person spent time cuts the chance of re-infestation after the wash cycle finishes.

Hard Floors and Surfaces

Vacuum hard floors and wipe down surfaces with a damp cloth, then empty the vacuum bag or canister outdoors. Match the cleaner to the surface, because ammonia-based products can darken or streak wood flooring. If a wood floor absorbed contact with contaminated bedding, the chemical methods used when refinishing ebonized oak flooring target pet urine and ammonia stains and show how to neutralize marks without sanding the entire surface.

Upholstery, Carpets, and Vacuuming

Carpets rarely need professional treatment; regular vacuuming removes lice and eggs from the pile. Vacuum slowly in overlapping passes so the suction lifts eggs from the carpet fibers, then seal the vacuum contents in a bag before disposal. For upholstered furniture, vacuum seams and crevices where eggs hide and steam-clean removable covers on the hottest setting the fabric allows.

Vacuuming Protocol

Work top to bottom in each room: curtains and upholstery first, then furniture, then floors last. This order keeps dislodged eggs from falling onto surfaces you already cleaned. Dispose of the vacuum contents immediately rather than leaving the bag in the machine, where eggs can hatch and crawl back out.

How Head Lice Spread and Preventing Reinfestation

Head lice spread by direct head-to-head contact far more often than by fabric. Lice cannot jump or fly; they crawl from one scalp to another when heads touch, which is why infestations cluster among children who share beds, headphones, and hair accessories. The laundry routine still matters because fabric contact can move lice between family members, but the primary transmission route is person to person.

How Lice Spread

• Direct head-to-head contact during play, naps, or shared photos
• Shared combs, brushes, hats, and hair accessories
• Shared bedding, pillows, and towels
• Coats and scarves stored on the same hooks or racks

Lice survive only a short time away from the scalp, which is why transmission through shared objects happens less often than contact transmission but still occurs within a household.

Environmental Cleanup That Breaks the Cycle

The final piece of prevention is checking every surface the infested person touched, including storage areas where bins sat during the quarantine period. Garage and basement floors where boxes and bags rested can be scrubbed with the same approach used for removing concrete stains, which breaks down oil and organic residue before you return clean laundry to those spaces. Finish with a two-week scalp check for every household member, and keep the hot-water laundry routine running until no new eggs appear.