Will apple or at&t know if i opened my iphone 6?

I got water damage in my iphone 6. If i open it up and get any excess water out, close it, and take it to apple or an at&t store, will they know that it was opened and not deal with it?

Added (1). I understand that they will know there was water damage, obviously. How stupid do you think I'm…

I'm asking if they will know that i opened the phone up prior taking it to get fixed. As in i unscrew the pentalobe screws and take the screen off and put it in rice from there. Then I Put the screen back on and take it to the store

Yeah they'll know! Firstly, only experienced Apple techs can get into those without it showing. You'll damage the casing, you haven't got the experience to do it invisibly.

Secondly, all the water detector stickers inside will have already tripped.

Of course they know, there are water indicators inside that flip color once water has touched them so water damage is always easy for them to know.

They aren't stupid if thats what you think.

Yes, they will know. The phone contains moisture detectors that permanently change color if the inside of the phone is exposed to water.