In 2015, I had a similar curiosity. Coffee stack exchange was just getting started and the top answer is enlightening. https://coffee.stackexchange.com/questi

In 2015, I had a similar curiosity. Coffee stack exchange was just getting started and the top answer is enlightening. https://coffee.stackexchange.com/questions/1749/brewing-with-the-same-coffee-grounds-twice https://coffee.stackexchange.com/questions/1749/brewing-with...