luckily it was normal tap drinking water. not much luck with sun these days though. it's been pouring for a while now.
i can clearly see drops and fog on the inside of the glass now. i guess it's a sign that there is some evaporation and drying taking place. but also the final proof that there is indeed moisture inside.
so, trying to open the lens is out of the question, i assume after reading the posts. well, i'll see if i can find a optics technician who will check and clean it for me.