There is a special type of knife called the paring knife. It is used to remove the outer layers of the fruits. The small knives in the kitchen that we use to peel the apples are an example of a paring knife. Washing them in the dishwasher is not a good idea. There are certain things in the dishwasher which will cause damage to them.
When these are placed in the dishwasher to get washed, the dishwasher will spray a large amount of water on them. The second important factor is time. In the dishwasher, the knives will be kept for a longer period of times. This can damage the knife blade as the blade can get rust. The handle will also not be saved from the effects of moisture and it will start to get damaged.
The utensils inside the dishwasher need heat to get dried. The heat is given by the electric heater and it is built-in the dishwasher. Heat is not good for the blade of knife especially when the knives have moisture on them. Paring knives handle is made of plastic mostly so the handle will get damaged due to the heat.
These knives are mostly designed to peel fruits and are not very good at facing harsh environments. If heat is for a minute or moisture is only there when cutting the fruit, the knife will handle it in a really good way. They are not good when these same things come for a long time.
When the knives are placed inside the dishwasher, there will be a great problem of turbulence also. The machine will throw pressurized water on utensils so the utensils get cleaned properly. This turbulence can also damage the knives.
It can be concluded after getting this detail from experts that one of the easy ways to ruin your knives is to place them in the dishwasher regularly!