I opened up the speaker covers today (with the intention of looking at the condition of the speakers because they are not performing that well, I wanted to get new ones). Well as I pulled of the covers a reasonable amount of water came out

I think I have found the leak, I pulled door the panel of I ran some water down the outside the widow with the hose and found that it just goes straight into the door, this happens on both sides. Thus meaning the window rubbers aren’t doing their job. On closer inspection they are not even touching the glass and seam very hard and brittle
Has anyone else had this problem?
Am I correct that changing the rubbers will fix the problem?
How hard is it to get new rubbers?
Is it difficult to remove and install the rubbers?
Regards

Ryan