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We usually use cotton swabs to clean our ear-dirt; however, we often encounter some problems.
Sometimes, when cotton swab accidentally touches the eardrum, it makes us painful. Sometimes, seriously, if cotton swab pushes ear-dirt more inside of ear canal and after a long time accumulation, it easily could cause inflammation. So, we find there is a great exterior design flaw on the ordinary cotton swabs which can clean only the front part of the ear canal. If cotton swab enters more inside, the more cleaning will push ear-dirt deeper and finally make anti-effects.
Ling Tung University Taiwan (R.O.C.)
Yu-Ping Hsu No.1, Ling tung Rd., 40852 Taichung, Taiwan