An apparatus includes a body assembly, an acoustic waveguide, an ultrasonic blade, and a liquid dispensing feature. The ultrasonic blade is positioned distally relative to the body assembly. The ultrasonic blade is in acoustic communication with the acoustic waveguide. The liquid dispensing feature is positioned distally relative to the body assembly. The liquid dispensing feature is positioned adjacent to the ultrasonic blade. The liquid dispensing feature is configured to deliver a flow of cooling liquid to the ultrasonic blade.