Water heater intermittent
 

Our electric water heater is working intermittantly in recent weeks.
Sometimes there's not enough hot water for the first person showering
in the morning. The water heater came with the home and hasn't been
changed for many years.

Is it worth draining and/or attempting to change the element? Or
having a plumber check it? Or should we just buy a new one?

Could be a loose connection at the incoming power or at any connection
inside the heater IE the therm or element-s