This is the second batch that I buy because they are super cut level, so that the same shall be a Christmas gift for a loved one. I do not wash in the dishwasher because the frequency of use is faster than the dishwasher. I just sharpening sharpener with Pradel Excellence T1031DD Electrical Special Ceramic Knives I bought double as my gift to complete because it does both steel and ceramic. Personally ceramic knives wear out and lose everything as a little edge, the big advantage is that they wear is very slow compared to steel knives. I felt the need to sharpen after a year of daily use and still cut great.