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Cotton swabs (American English) or cotton buds (British English) or ear buds (Australian and South-African English) consist of a small wad of cotton wrapped around one or both ends of a short rod, usually made of either wood, rolled paper, or plastic. They are commonly used in a variety of applications including first aid, cosmetics application, cleaning, and arts and crafts. The cotton swab was invented in the 1920s by Leo Gerstenzang after he attached wads of cotton to toothpicks. His product, which he named "Baby Gays", went on to become the most widely sold brand name, "Q-tips", with the Q standing for "quality". The term "Q-tips" is often used as a genericized trademark for cotton swabs in the USA. Although doctors have said for years that usage of the cotton swab for ear cleaning is not safe, that use remains the most common.
The traditional cotton swab has a single tip on a wooden handle, and these are still often used, especially in medical settings. They are usually relatively long, about six inches (15cm). These often are packaged sterile, one or two to a paper or plastic sleeve. The advantage of the paper sleeve and the wooden handle is that the package can be autoclaved to be sterilized (plastic sleeves or handles would melt in the autoclave).
Cotton swabs manufactured for home use are usually shorter, about three inches (7.6聽cm) long, and usually double-tipped. The handles were first made of wood, then made of rolled paper, which is still most common (although tubular is also used). They are often sold in large quantities, possibly 111 or more to a container. Swab stems exist in a wide variety of colors, such as blue, pink or green. However, the cotton itself is traditionally white.
The most common use for cotton swabs is to clean or scratch the ear canal and/or to remove earwax but this is not a medically recommended method for removing earwax. Cotton swabs are also commonly used for applying and removing makeup, as well as for household uses such as cleaning and arts and crafts. Medical-type swabs are often used to take microbiological cultures. They are swabbed onto or into the infected area, then wiped across the culture medium, such as an agar plate, where bacteria from the swab may grow. They are also used to take DNA samples, most commonly by scraping cells from the inner cheek in the case of humans. They can be used to apply medicines to a targeted area, to selectively remove substances from a targeted area, or to apply cleaning substances like Betadine. They are also used as an applicator for various cosmetics, ointments, and other substances. One recent innovation is to use a special type of double-tipped cotton swab for over-the-counter drug application. These swabs have hollow tubular plastic handles, which are filled with the medicine. Breaking one marked end of the swab breaks an air seal, allowing the medicine to saturate the cotton at the other end so that it can be directly applied with the swab. Cotton swabs can be used in the dyne test for measuring surface energy. This use is problematic, as manufacturers differ in the binders they use to fix the cotton to the stem, affecting the outcome of the test. Cotton swabs are also used for cleaning the laser of an optical drive in conjunction with rubbing alcohol. Cotton swabs were also used widely to clean video game cartridges. Cotton swabs are also used to clean computer parts such as hard drives, optical drives, video game cards, and fans. The American brand name "Q-Tip" is now owned by the British-Dutch conglomerate Unilever.
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