Barcus Berry DISQOS - Manual (Page 6)

CAUTION:
To prevent damage to the instrument or transducer
when removing the adhesive pad, be careful not to pull
the wire or bend the transducer. Carefully slide a thin
material such as a guitar pick between the soundboard
and the pad to free the transducer. Residual adhesive
should then be removed from the brass surface of the
transducer by rolling it off with your thumb. Care must
be exercised to avoid bending the transducer as such
damage is not covered by the warranty.