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Getting annoyed with pen and eraser marks on your Sudoku or your favorite crossword puzzle? The newest technology from Sharpie offers a smooth glide of a pen but with erasable ink. The amazing Sharpie Liquid Pencil ($4) uses Sharpie’s Liquid Graphite Technology which makes broken pencil leads a thing of the past. This technology makes anything you write permanent on paper after 24 hours so you won’t have to worry about missing scribbles ever again.