Ａｌｃに無し。嘘のようだが本当だ。
Kogation is the phenomenon that ink ingredients are thermally decomposed and deposited on the surface of a bubble jet heater, and is coined from a Japanese noun 徒oge・which means scorch, burn, or char.
Kogation is a Japanese word for cake or bisquit. It is a buildup of carbon on the resistors of the printhead, which corrode the heaters and block the holes. Thus, making prints "suck." One possible solution is to take a cotton swab and use only water, NO ALCOHOL, to clean the cartridge.
