system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5 - Why i cant remember most dreams after i wake up

I can usually remember the more vivid dreams. I woke up this morning and i remember thinking wow that was a cool dream but now i can't remember what it was about.
gpt
Dreams actually use up memory in the brain, but it is not stored in long term memory, only short term - like a phone number from the chinese place. So when you wake up your brain starts erasing the short term for new memories. So, when you wake up most dreams get erased and new memories take their place.