very funny :/

HI Folks Since a few days my right passenger box spins.. first she always went out and again and for a short time she almost doesn’t go at all… today after washing the car you thought of building the clothing away to look at it… thought first that the connection from the frequency soft has become loose, so the screw… well then as I said the clothing was taken away and looked inside… but at first glance there was nothing to recognize, all screws were fixed and so on. then I screwed out the box and when I had it in my hand habi h immediately noticed that the box behind is wet:O then I also looked at the connections and those were fully oxidized… down in the door was also wet b or there were isolated drops, the window lifter engine was also bit wet… now my question: Is that normal the water comes in there? would be net if someone could clear me up. I will probably make a few of them anyway.