Caring for your Racket
Avoid impacts with hard objects or court surfaces which may cause cracks or breakage in the frame. Racket bumper guards or head tape can protect the racket from on-court scrapes. If the bumper shows excessive wear or exposes the frame, replace both the bumper guard and the grommet strips. Off court, a cover or racket bag will help protect the racket.
Store racket in a cool, dry place, away from direct sunlight. Excessive heat, cold, or moisture can damage your racket and strings, and sunlight may fade the racket cover.
Do not store the racket inside your car or in your trunk. Synthetic strings begin to lose tension at about 110 degrees F (43 degrees C). On a sunny, 90 degree F (32 degrees C) day, the temperature inside your car can soar to as much as 140 degrees F (60 degrees C) which is hot enough to even soften the resins in a frame and distort the racket. If you are planning a game after work, take your racket into the office; do not leave it in the car!
Synthetic cushion grips, while offering excellent absorption and feel, will wear out.
A rattle in your racket may be caused by some loose graphite, this is not normally a cause for concern. Check the butt cap for a trap door. Remove the trap door, using a small-pointed hard object, and tap lightly on a hard surface to release the loose graphite.
If you feel your racket has a manufacturing defect, return it to the store where it was purchased.