A four to five degree rise in temperature is fatal for lice. They prefer cold environments where clothing layers provide a humid to dry gradient. They also flourish best in hot dry climates where a temperature gradient exists in clothing.
Although freezing temperatures can kill head lice and nits, several days may be necessary depending on temperature and humidity; freezing is rarely (if ever) needed as a means for treating head lice.
Kill head lice by washing infested articles in hot water (at least 140°F) and drying in a hot dryer. Items that cannot be laundered such as headgear, earphones, and bike helmets, can be placed in a plastic bag and put in a freezer. If the freezer is 5°F or lower, all lice and eggs should be dead within 10 hours.
Off the host, adult head lice can live about two to four days at 74 degrees Fahrenheit (F) and one to two days at 86 degrees. Nits will remain alive off the host for up to 10 days; they will not hatch at or below room temperature (68 degrees F).
Smothering agents.
Some people try to suffocate and kill lice by putting large amounts of a greasy substance on your scalp, covering with a shower cap, and leaving it on while you sleep. You can try petroleum jelly, mayonnaise, or olive oil.
Spinosad (Natroba).
Spinosad is approved for adults and children age 6 months and older. It can be applied to dry hair and rinsed with warm water after 10 minutes. It kills lice and nits and usually doesn't need repeated treatment.
So, the realistic answer is “No, you can't drown lice.” The best treatment for lice is to get them picked out by a professional – Lice Geeks, for example – using the right comb. Even over-the-counter shampoos and products aren't as effective as a well-trained professional wielding the proper comb.
Females start laying eggs 1-2 days after maturity. Body lice live from 30-40 days and survive best at the body temperature of humans. A four to five degree rise in temperature is fatal for lice. They prefer cold environments where clothing layers provide a humid to dry gradient.
Machine wash and dry clothing, bed linens, and other items that the infested person wore or used during the 2 days before treatment using the hot water (130°F) laundry cycle and the high heat drying cycle. Clothing and items that are not washable can be dry–cleanedORsealed in a plastic bag and stored for 2 weeks.
As head lice can live on pillows, you'll need to clean them. Adult lice can only survive for two days without a host. However, they can still lay eggs. If the infected person has had a lice treatment and then picks up stray lice from their pillow, the lice infestation cycle can start all over again.
Lice and nits can't survive the high heat. It's true that lice and nits can't survive temperatures above 113°F (45°C). This makes them susceptible to any heat source, such as a hairdryer or the plates of a hair straightener.
Lice are also tenacious and can't be killed with a hot shower or strong shampoo. If you find evidence of lice treat all members of the household. Also, wash linens and towels on a hot setting of the washing machine.
Hair gels, hairspray, oils or other non-medicated products do not kill lice or their eggs. Cutting your child's hair or shaving their head to get rid of lice won't keep them away. Lice stick to short and just “grown in” hair too.
Adult lice can live up to 30 days on a person's head. To live, adult lice need to feed on blood several times daily. Without blood meals, the louse will die within 1 to 2 days off the host.
To survive, adult head lice must feed on blood. An adult head louse can live about 30 days on a person's head but will die within one or two days if it falls off a person. Adult female head lice are usually larger than males and can lay about six eggs each day.
Anyone found to have lice or nits should be treated as well. DECONTAMINATION OF PERSONAL ARTICLES AND ENVIRONMENT: Since heat kills lice and their eggs, many personal articles can be disinfected by machine washing in HOT water and/or drying using the HOT cycle of the dryer.
While lice cannot survive extreme cold, they are perfectly happy to stay on your child's head where it's quite warm in order to feed on the blood under their scalp. Winter may bring about fewer instances where your kids will come into contact with others, but there will still always be some.
It is not usually possible to get rid of lice in one day, as an infestation needs to be treated. However, there are treatments that can help get rid of lice and symptoms caused by lice more quickly. Lice infestations must first be treated by improving the hygiene of the infected person.
Simply washing the items in hot water and drying them at a high temperature should get rid of the critters. The head louse (Pediculus humanus capitis) is easily killed by temperatures above 122 degrees Fahrenheit, and the typical residential hot water temperature is about 130 degrees.
Lice are attracted to the blood they get through your scalp – short, long, clean or dirty.
Body lice generally are found on clothing and bedding used by infested people. Sometimes body lice are be seen on the body when they feed. Body lice eggs usually are seen in the seams of clothing or on bedding. Occasionally eggs are attached to body hair.
About 6 million to 12 million of them get it every year. Head lice are most active at night. They can cause such intense itching that your child could lose sleep over it.
Typically, 10–15 head lice are found. The number of lice often depends on personal hygiene, for example, how often the person bathes, shampoos, or changes and washes his/her clothing.
A preventative shampoo and spray can break the life cycle. A shampoo that kills lice before they can lay eggs is critical for closing the “bridge” from one head to another. Ladibugs experts recommend parents seek effective, pesticide-free options.
Avoid sleeping in the same bed as the person with an active lice infestation. Avoid sitting where the person with lice has sat in the past two days. Wash linens and clothing in hot water and dry on high heat. Place stuffed animals, pillows and items that cannot be washed into an airtight bag for two weeks.