The Milton Fire Commission approved a new staffing format Thursday aimed to help firefighters respond more quickly to calls and ease what Fire Chief Ernie Rhodes called a “staffing crisis.” The Milton department will have one full-time firefighter and three paid on-premise firefighters available to respond to emergencies 24 hours a day Monday through Friday. The on-premise firefighters will cover those hours in shifts. A fifth on-premise employee will join the four regular staff on weekends. The number of volunteer firefighters has decreased in Milton, and the department was struggling to keep up with calls, said Rhodes, who implemented the staffing change Feb. 7.