I take a portion of a colony from an E. coli streaked plate and inoculate it into 50 ml of LB medium. It is incubated in a shaking incubator for 24 hours. After 24 hours, 2 ml is transferred into fresh medium, and OD measurements at 620 nm are taken every hour. After 10 hours, the OD reaches 1. What should I do to ensure the OD reaches 1 more quickly?