What should I do to use the transparent case for a long time so that it doesn'

A. 1

It's hard to prevent discoloration even if you leave it alone.
The less you touch it, the more it prevents it from being stained

Gentleman 8 years ago 0

OK

A. 2

It seems to be the limit of the transparent case.
I think it'd be good to just buy something cheap and change it.

Gentleman 8 years ago 0

OK

A. 3

If you wash the case with soap from time to time, you can use it clean for a long time

Lady 8 years ago 1

OK