Guys, my screen got a dead pixel

Took back to SC and ask what is the solution, technician checked and said LCD panel need to change..

but as someone said once open up the phone, the water resistant feature will be weaker..

so how should i proceed?

bought this online
placed order on 24th and got it from fedex just now
$34.95 (USD) including shipping (shipped from hong kong)

well since i am using otterbox symmetry, they fitted well
in fact, according to the instructions, the first step is to put on the case first

aligning it was a tough job tho. the top and bottom of the sp is black with some small transparent areas for the light
u need to make sure the small transparent hole on the top fit the led notification light, then the back and recent apps at the bottom.
it should be easier if the sp is all-clear type