The only time the brain takes out the trash is while you sleep: https://news.ycombinator.com/item?id=25427090 https://news.ycombinator.com/item?id=25427090 It

The only time the brain takes out the trash is while you sleep: https://news.ycombinator.com/item?id=25427090 https://news.ycombinator.com/item?id=25427090 It also does a memory cache reset during sleep, from what I gather.