To keep the locks from freezing, squirt an approved de-icer fluid or glycerine into the key opening. If a lock is covered with ice, squirt it with an approved de-icing fluid to remove the ice. If the lock is frozen internally, you may be able to thaw it out by using a heated key. Handle the heated key with care to avoid injury.
Kia Cee'd JD Service Manual: Front Door Inside Handle Repair procedures
Replacement
1.
Remove the front door trim.
(Refer to Front Door - "Front Door Trim")
2.
After loosening the mounting screws, then remove the front door inside
handle (A).
3.
...
Kia Cee'd JD Service Manual: Rear Seat Back Cover Repair procedures
Replacement
[LH]
•
Put on gloves to protect your hands.
•
...