Yesterday, i took my z2 with me to the swimming pool to take some photos with it , And morning today a noticed a water droplets in the inner layer of lens,I searched for that online and i tried a solution for opening the flaps and shooting in 4k or heating it with hair dryer,Anyway it Worked but then i noticed another thing, there is water stains remains inside with no answer to how to get rid of them, I really need your help Thanks