My case is the same as yours, but of course with more hiccups. I am not trusting all the nonsense of water and dust proof anymore in the future le. My Z will reach 1yo by end this month, I think I will go their service centre to make them either change a new set of me or change all the flaps. The so call water proof flaps are quite a joke lor. I am doubtful if I will get another Xperia after this...
changing or flaps isnt free.
it was mentioned in a new thread or somewhere in dunno XZ or XZ1 thread that he was charged $50 or $60 to change one of the flap.
I emailed Sony and also call them, and both did reply me that changing of the flap isnt free.
If u look at the previous page, I've removed my spoilt flap and ordered some new ones online.
no way am I gonna pay 50, 60 bucks just to replace a flap due to poor design.
heck, i dont even need the waterproofing features in the first place.
So I wont be putting in the new flap any time soon. prob only when I intend to sell my Z