Your knives are some of the most critical pieces of equipment in your kitchen.But if you're not treating them right, they can get worn out fast. .Here are five of the most common mistakes you might be making with your knives:.Cutting on a glass cutting board or ceramic cheese plate can damage the blade each time the knife comes down. .As easy as it seems, the dishwasher is not the place for kitchen knives if you want them to last a long time.Knives that live in a drawer among other pieces of cutlery can easily be damaged by the jostling about.If you use your knife like a handsaw, the blade is probably worn down, and you're wearing it down further.It is tempting to grab a kitchen knife to slice open the top of a box, but using them on non-food items is a bad idea