system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why do plastic items not dry in the dishwasher as well as glass items?
gpt
Not enough heat capacity.

To save energy, the dishwasher doesn't blast hot air on the dishes until all the water is gone.  Instead it heats them up to a pretty high temperature (which also sanitizes them) and then circulates air over them.

Glass and pottery store heat really well, as you've learned when you try to take them out of the microwave, and they boil the water off.  The plastic is just too light, and it doesn't store enough heat to evaporate all the water that is on it.