The happy owners of the Samsung Galaxy S4 Zoom often face the problem of dust getting under the glass of the camera. It is logical to assume that even without knowing the device of the phone, two approaches can be distinguished in resolving this problem, where the first is complete disassembly and the second is the glass separation from the outside. As it is not difficult to guess, we recommend the second method, since the principle of Occam's razor.
The separation process is uncomplicated, warm the glass well enough so that the adhesive base softens under it and pry with a scalpel, spudger or any other convenient tool and lift the glass.
Gently clean the glass, remove the old adhesive tape, decreasing the surface - apply a continuous layer of sealant in the places where the adhesive tape was previously and glue the glass back.