“Dishwashers can absolutely dull the blades on sharp knives,” Many of us will chuck our knives into the dishwasher to clean them. Putting knives in the dishwasher can dull them over time. You should never put your chef knives into a dishwasher to clean them as this can cause rusting, blunting/dullness of the blade. For the sake of keeping your blade in good shape, we do not recommend putting your chef knife in your dishwasher. Just visit our website once to get dishwasher dull knives at best cost.