if a non-Jew handles my tefillin, do they lose any kedushah? Are they still kosher?
Answer:
Tefillin, or other items of kedushah, do not lose their kedushah by being touched by a non-Jew. They remain precisely as they were before. The only item that the touching (or, rather, moving) of a non-Jew affects, is wine, which the rabbis decreed should become forbidden to drink. Otherwise, the touch of a non-Jews does not affect items of a mitzvah or of kedushah.