Silicone grease on weatherstrips will make them last longer, seal better, and not stick or squeak. Apply silicone grease with a clean cloth. During very cold, damp weather frequent application may be required.
See Recommended Fluids and Lubricants.
Chevrolet Cobalt Service & Repair Manual. Door Handle
Exterior
Front
1.
Remove front door trim panel as outlined
in "Door Trim Panel."
2.
Remove front door water deflector.
3.
Remove three front door handle retaining
screws, Fig. 1.
...