Mazda 3 Owner's Manual page 277

Interior Features
Audio System
Operating Tips for CD Player
Condensation phenomenon
Immediately after turning on the heater
when the vehicle is cold, the CD or
optical components (prism and lens) in
the CD player may become clouded with
condensation. At this time, the CD will
eject immediately when placed in the unit.
A clouded CD can be corrected simply by
wiping it with a soft cloth. Clouded optical
components will clear naturally in about
an hour. Wait for normal operation to
return before attempting to use the unit.
Handling the CD player
The following precautions should be
observed.
The CD revolves at high speed within
the unit. Defective (cracked or badly
bent) CDs should never be used.
Do not use non-conventional discs such
as heart-shaped, octagonal discs, etc.
The disc may not eject resulting in a
malfunction.
5–20
If the memory portion of the CD is
transparent or translucent, do not use the
disc.
Transparent
A new CD may have rough edges on its
inner and outer perimeters. If a disc with
rough edges is used, proper setting will
not be possible and the CD player will
not play the CD. In addition, the disc
may not eject resulting in a malfunction.
Remove the rough edges in advance
by using a ball-point pen or pencil as
shown below. To remove the rough
edges, rub the side of the pen or pencil
against the inner and outer perimeter of
the CD.
When driving over uneven surfaces, the
sound may jump.