Has debris found its way between the casing and the screen? Use this guide to remove and clean the screen.
As handling the display housing may damage the wire strip, use caution.
On the door's bottom edge, locate the gap between the external and internal screen covers.
Using a spudger (not shown), gently pry apart the external and internal covers until the sides start to separate.
Continue working your way along the edges of the phone, alternating sides, until the external cover can be easily removed.
On the display housing, locate and unscrew the four corner T6 Torx screws connecting the housing and the internal cover.
Locate the gap between the display housing and internal cover, in the same manner you would flip open the phone, use your finger (not shown) to lift the housing from the cover and set it down.
Using a lens cloth, wipe away any dust or debris from the display or screens.