Barista pressure

I have a Barista, I bought it about a year ago. I am using the double shot. I like a strong flavor, and have the grind setting on 3. I find I have to set the grind amount to just shy of the max in order to get the pressure into the red. It’s been working fine, but about a month or so ago the pressure now seldom gets into the red, staying around 9:00. Could it be they the pump is losing its mojo? Or something else? I’m not sure if this means something needs cleaning or….any experience out there with what works?