system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Finally need to settle the score, is it the washing machine or the dryer that shrinks my shirts?
gpt
Dryer, usually. Think about what happens in each machine, versus how you would do it by hand. When you wash clothes by hand, you put them in water with some laundry soap and swish them around a lot and then rinse the soap off. That is exactly what a washing machine does, so if washing stuff by hand doesn't shrink it, a washing machine probably won't. 

When you dry clothes by hand, you put them on a rack or clothesline and wait. When you dry them in a dryer, it heats them very hot and tumbles them around quickly for about an hour. The heat is usually what shrinks stuff, so if you put things on the very hot cycle in the washing machine, they still might shrink.

But if you put clothes on the normal or gentle cycle in the washing machine and then hang them up to dry, they will almost definitelynot shrink.