
Lice combs are an effective treatment for head lice infestations. The thin, closely arranged teeth of a lice comb help scrape off lice and nits that chemicals or other treatments might not kill. However, lice and nits can also get trapped in the small spaces between the comb's teeth, making it possible to reintroduce them into the hair. Therefore, it is essential to clean a lice comb properly after each use. The most effective way to kill lice on a plastic comb is to soak it in hot water at a temperature of 130°F (54°C) for 5–10 minutes. This sanitizes the comb and disinfects it from any surviving lice or nits.
| Characteristics | Values |
|---|---|
| Cleaning lice combs | Soak in hot water (130°F/54°C) for 5-10 minutes |
| Soak in pediculicide for up to 1 hour | |
| Soak in hot, soapy water | |
| Use bright lights or a magnifying glass to check for lice or nits after soaking | |
| Replace plastic combs frequently as they can harbour bacteria | |
| Treatment for lice in hair | Use pediculicide shampoos or lotions |
| Use over-the-counter treatments with pesticides, such as permethrin lotion or piperonyl butoxide with pyrethrins | |
| Prescription treatments, such as Lindane shampoo or Ivermectin lotion | |
| Benzyl alcohol may be effective, but it is only suitable for children over 6 months and pregnant or breastfeeding women | |
| Combing hair with a lice comb can be an effective treatment, especially when combined with lice treatments |
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What You'll Learn

Soak the comb in hot water
Soaking combs in hot water is an effective way to kill lice and sanitise combs. It is recommended that you soak the comb in hot water for 5 to 10 minutes. The water temperature should be at least 130°F (54°C). Before placing the comb in the water, check the temperature with your hand to ensure it is hot enough.
Lice and their eggs, also called nits, can be removed from hair using lice combs. However, the small spaces between the comb's teeth can trap lice and nits, making it possible to transfer them back into the hair. Therefore, it is essential to clean the comb properly after use.
To effectively kill lice and nits, the water temperature must be above 130°F (54°C). If the water is not hot enough, it will not sanitise the comb or kill the lice and nits as effectively.
After soaking the comb, use bright lights or a magnifying glass to examine the teeth closely. Look for small, white, round objects in or around the comb's teeth, which may be lice or nits. If you notice any, soak the comb again to ensure all lice and nits are killed.
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Use a pediculicide treatment
Pediculicide treatments are a highly effective way to kill lice and nits on plastic combs. Pediculicides are strong shampoos or treatments that contain powerful substances to kill lice and their eggs. They are available over the counter or with a prescription.
There are several pediculicide treatments to choose from, including:
- Permethrin lotion,1% (Nix): This lice shampoo is approved for use in babies and children aged 2 months and older.
- Piperonyl butoxide with pyrethrins (A-200, Pronto, R&C, Rid, Triple X, Xeglyze): These are available as OTC treatments and contain pesticides.
- Lindane prescription shampoo: This is FDA-approved to treat lice but is no longer recommended by the American Academy of Pediatrics due to its link to nervous system damage.
- Ivermectin (Sklice): This lotion kills most head lice, including newly hatched ones, and is safe for children aged 6 months and older.
- Malathion (Ovide): This is a very strong lotion that paralyzes and kills lice and some lice eggs. It is approved for use in children aged 6 years and older.
- Spinosad (Natroba): This product usually requires only one treatment and is safe for kids aged 6 months and older.
When using a pediculicide treatment, be sure to read the label carefully to ensure you are not allergic or sensitive to the chemicals. Follow the instructions provided with the treatment, and do not use more than the recommended amount. In addition, avoid combining products or using a combination shampoo/conditioner before applying lice medicine.
It is important to note that some pediculicides may not be fully effective, even when used according to the instructions, due to the development of resistance. If you still see lice moving after using an OTC treatment, consult your doctor, as you may need a stronger product.
To clean a lice comb using a pediculicide treatment, soak the comb in the treatment for up to 1 hour. Alternatively, you can soak the comb in hot water (at least 130°F or 54°C) for 5-10 minutes. This will help sanitize and disinfect the comb, killing any surviving lice or nits.
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Wash the comb with soap
To effectively kill lice on a plastic comb, one method is to wash the comb with soap. This is a simple and cost-effective way to sanitise your comb and prevent the spread of head lice.
Firstly, it is important to note that lice can survive and spread from a lice comb even when they are no longer living in your hair. Therefore, it is crucial to clean your comb after every use. Before you begin washing the comb, ensure you have protective gloves on to avoid direct contact with lice or nits.
Next, prepare a mixture of hot water and soap. The water should be hot but not boiling, as this may damage the plastic comb. You can use dish soap or a mild detergent for this step. Submerge the comb in the soapy water and let it soak for at least 5-10 minutes. This will help to loosen and kill any lice or nits trapped in the comb. Use a toothbrush to scrub the comb's teeth and remove any remaining debris.
After soaking and scrubbing the comb, rinse it thoroughly with warm water to remove any soap residue. Inspect the comb closely for any remaining lice or nits. If you notice any, repeat the soaking and scrubbing process until the comb is completely clear of lice.
Finally, dry the comb by placing it on a clean towel and allowing it to air dry. Alternatively, you can use a hairdryer on a low heat setting to speed up the drying process. Remember to clean any other hairbrushes or combs in your household to prevent the spread of head lice.
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Use a metal comb instead
Plastic combs can be effective in removing lice and nits, but they can also trap the lice and nits in the small spaces between the comb teeth, allowing them to be reintroduced into the hair. Additionally, plastic combs may need to be replaced frequently as they can harbour bacteria.
One alternative to using a plastic comb is to opt for a metal comb, such as the Nit Free Terminator Lice Comb or the Lice Sisters Metal Lice Comb. Metal combs are designed with fine, closely spaced teeth that can effectively trap and remove lice and nits from the hair. They are also long-lasting and gentle on the scalp, making them suitable for both children and adults.
When using a metal comb for lice removal, it is important to follow certain steps to ensure its effectiveness and maintain good hygiene. Firstly, before each pass through a section of hair, dunk the metal comb into a bowl of boiling hot water to kill any trapped lice or nits. This step may be time-consuming and may require frequent changes of water, but it is crucial for sanitization. Additionally, use a toothbrush to meticulously clean the metal teeth after each pass to remove any remaining eggs or debris.
After completing the lice removal process, it is essential to properly clean the metal comb to prevent the spread of lice. Soak the metal comb in hot water, ensuring a temperature of 130°F (54°C), for 5 to 10 minutes. This step helps sanitize the comb and kill any remaining lice or nits. Remember to use clean water and test the temperature before soaking the comb. If the water is not hot enough, it may not be effective in killing the lice.
Using a metal comb in conjunction with lice treatment shampoos or lotions can further enhance the effectiveness of lice removal. These treatments, known as pediculicides, are available over the counter or by prescription and are designed to kill live lice and their eggs. It is important to follow the instructions on the label and consult a doctor if you have any questions or concerns. By combining a metal comb with effective lice treatments, you can maximize the chances of successfully eliminating lice and preventing future infestations.
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Vacuum the surrounding area
Vacuuming is an important step in treating head lice and preventing their spread. Lice can crawl off the scalp and onto nearby surfaces, so it is crucial to vacuum areas that may have been in contact with lice. This includes rugs, sofas, upholstery, furniture, and floors.
Vacuuming helps to remove hairs that may have active lice or eggs attached. Lice need human blood to survive, so they do not live long after falling off the body, but they can survive for a short period and potentially spread to other people. Vacuuming helps to eliminate this risk by physically removing potential sources of lice and disrupting their potential habitat.
It is recommended to focus on areas where the infested person sat or lay, as these are more likely to have come into contact with lice. This includes vacuuming beds, sofas, and any other furniture they may have used. It is also important to vacuum rugs and carpets, as lice can fall onto these surfaces and potentially be transferred to another person's hair or body.
Vacuuming should be done thoroughly and regularly during the treatment period to help prevent the spread of lice and reduce the risk of re-infestation. It is a simple yet effective step in managing head lice and ensuring they do not spread throughout the home.
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Frequently asked questions
Soak the comb in hot water (at least 130°F or 54°C) for 5-10 minutes.
You can soak the comb in a pediculicide treatment for up to 1 hour.
Use bright lights, a magnifying glass, or both to examine the teeth of the comb closely. Look for small, white, round objects in or around the comb teeth.











































