Thank you so much 02 Ateva for posting this. My Corolla had exactly the same problem as you described and I was able to fix it by just following your steps (the pictures were extremely useful too). I couldn't quite get every drop of water out of the interior of the unit, but I did use the hairdryer to ensure the electrics were completely dry before reassembling. I am hoping some sunny weather will sort out the rest.
As for the new gasket JDM101, I would assume the sticky side should face towards the car body as that's where 02 Ateva said to put the silicone and that was definitely where the leak was happening. Mind you, I think this has been an afterthought, on the part of Toyota, to fix a problem that is obviously fairly common.
Thanks again for the step-by-step instructions… hoping not to have to do the other unit, but certainly won't hestitate to do it if the problem rears its ugly head on that side.
Regards Lyndelle.
