For me, it'd have to be would have to be eyeliners that require sharpening, especially when the eyeliner itself is sort of soft and creamy. I can never get it back into a nice tip, and it always end up very blunt. I hate, hate, hate sharpening eyeliners, they always clog the sharpener and, let's be honest, so much makeup is wasted that way. Retractable crayon eyeliners are usually what I use, but I hate when there's a color or brand of eyeliner that I want to use, but requires sharpening. The same thing goes for lipsticks or basically any creamy pencil. Ah-noy-ing!
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