system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why does drying laundry on a line leave it wrinkly and feeling crispy?
gpt
The crinkle is from both left over soap and minerals drying and hardening. 

When you use tumble dryer, the same hardening happens, but in lots of small spots. On a Line the entire item can harden as one.