Christopher Hendon, a chemist at the University of Oregon, has been researching the science behind brewing the perfect cup of coffee. His latest study, published in *Nature Communications*, explores how sending an electrical current through coffee samples can help measure flavor profiles. Hendon's previous work focused on creating a mathematical model for optimizing espresso brewing by analyzing the extraction yield (EY), which is the amount of coffee that dissolves into the beverage. The team discovered that static electricity, generated during the grinding process, causes clumping of coffee grounds, which can hinder brewing. To combat this, they collaborated with volcanologists to investigate the effects of triboelectricity—the build-up of electric charges from friction. Their experiments revealed that adding a small amount of water to coffee beans before grinding significantly reduces static charge, leading to less clumping and a more consistent espresso. This technique, known as the Ross droplet technique, has been used by skilled baristas but had not been scientifically validated until now.