More specific please, What type of quail eggs? 14 days suggest you are incubating Cots/japs or some similar species. Bobwhite's incubation period is longer 21-23 days.
70-75% (high) humidity during hatch is fine. If it goes up to 80+% all the better as the wet chicks are usually the reason for the higher rise (80%) in humidity as they air dry.
What you probably read/heard about lower humidities was a incubation process known as dry incubation....not recommended for the inexperienced first time hatcher. Pay no attention to those topics and stick with the basics.