Moisture behind the door panel on drivers side

[Wood_95]

Hi there hope someone can offer some advise on this. My driver side door appears to have water streaks behind it. It's definitely not on top.
Is this something that can be fixed? Anyone else experienced this ?

 

[BoomerBoom]

Power washer damage?

 

[Wood_95]

Power washer damage?

I did you use a power washer 2 weeks ago but never noticed it. Wonder if this is fixable