Yes, wooden utensils are more prone to warping and rotting when put in the dishwasher compared to metal utensils. This is because wood is a porous material that absorbs water easily, and exposure to the high heat and prolonged water exposure in the dishwasher can cause the wood to expand, warp, and eventually crack.
Additionally, the dishwasher's harsh detergents and high temperatures can strip away the natural oils and protective coatings on wooden utensils, making them more susceptible to damage and decay. Metal utensils, on the other hand, are generally more resistant to these issues and can withstand the dishwasher's cleaning process without significant damage.
To preserve the longevity of your wooden utensils, it is best to wash them by hand using mild soap and warm water. After cleaning, you can apply food-safe oil or beeswax to protect and maintain the wood's quality. Metal utensils, however, can safely be washed in the dishwasher without these concerns.