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You can touch them up easily at home, but if they are that far gone then you are better off sending them in to be sharpened by a professional or just replaced.
Well it will shave a thin layer off the top and then just walk across the ice. The blades still feel sharp as they still catch on my jersey gloves
Please for give me, but it sounds as if they might have been removed and put back on incorrectly. Don't ask me how I would know this. Also in the Auger section of the Equipment forum, there is a step by step tutorial, with pictures, on how to sharpen auger blades.