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What's the best way to sharpen an eyebrow pencil?

—Nicole Kruse, New York City

Bobbi: The problem could be that your sharpener is the wrong size, so make sure you keep the one that comes with the pencil. If yours didn't have a sharpener, buy one that fits from an art-supply store (they tend to have better blades). Also, clean the blades frequently. The easiest way is to use a cotton swab with most of the tip removed, so it's small enough to get in there and clean out debris. Never use water—that could make your sharpener blade rust.

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