Move it back and forth along the pipe on a medium setting.
To avoid dealing with a frozen shower drain in the future, consider the following preventive measures: how to thaw a frozen shower drain
If your shower water has stopped draining during a cold snap, you’re likely dealing with an ice blockage in the P-trap or the drain line. Move it back and forth along the pipe on a medium setting
Never use calcium chloride or magnesium chloride in drains—they can corrode metal pipes and are toxic if they splash back on you. you’ve won. If not
To thaw a frozen shower drain, you'll need the following:
If the water starts to drain, even slowly, you’ve won. If not, move on.