The best thing to do is begin ripping out the paneling and expose the source of the leak. It's tough work, but it's worth the while because you know you got it and fixed it right!

Hey I have front left corner water damage too. Lucky us.

Ugh! I don't have the resources or manpower to do such an undertaking. One of sons are going away to college and the other and I are not so handy. I consider myself a DIY gal but this would be a bit much for me without the job (finances) to actually have the supplies on hand at the time to get the work done. I guess for now, I will have to invest in some flex-seal, RV antifreeze and some good research to at least preserve it before it gets too cold here in the north east while I save up to get what needed and maybe some help to get it done. Good luck on your end, Really. Can you keep me posted on your progress so I know how to do mine fix when I will be able to. Thanks