Hi All,  Two comments with regards to using incense sticks to test any
part of a player mechanism.

One, if there is a leak, the incense will leave an oily residue on the
surface of the material and it will have to be replaced.

Two, use a stethoscope with the 'listening' end removed.  I can't
even begin to imagine how a customer would react if I took out a stick
of arduous incense and lit it in their home.  I might as well light a
cigarette.  Bad taste.

I can guarantee beyond a shadow of a doubt that you will detect even
the tiniest of leak quickly and without any smell.  (Sorry Sonya,
I can't buy it!)

They call me,¶
Dr. John