How to fix the loose door handle?

When the door handle is loose, unscrew the outer cover first, then tighten the inner bolt, then tighten the screw of the outer cover, and finally install the cover. Details are as follows:

1. First, remove the shell.

2. Find the internal bolt and tighten it with a screwdriver.

3. Then tighten all screws on the outer cover.

4. Finally, screw on the protective cover.

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