FujiFilm WP-FXA500 Owner's Manual page 32

Preliminary check of the case
If any kind of foreign particles attached to the waterproof sealing, wipe it
off using soft, lint-free cloth or something similar.
If using tissue paper to wipe it off with, be careful, since fine lint may be left
behind.
Waterproof sealing
4
Close the waterproof case.
5
Dip the empty waterproof case into a water tank or a bathtub
and check for water leaks. For how to check it, see p.10.
To prevent water leaks
Any foreign particles attached to
the waterproof sealing may cause
a water leak. Remove the foreign
particles. If you cannot remove
them, replace the waterproof
sealing with a new one (p.17).
Waterproof sealing
Close the waterproof case after
clampling the buckle hook securely.
EN-8
When closing the waterproof case,
take care that the buckle does not
catch the hand strap.
It may cause a water leak.
Hair Lint Sand