Step 1. Search Caches
File caches are located inside two folders :

1. Macintosh HD/Library/Caches/
2. Home/Library/Caches/

Tips : Clicking on Home icon at sidebar will bring you to Home folder.

Step 2. Delete Caches
Highlight all the caches using keystrokes A and then delete them all in once using keystrokes .

Step 3. Clean the Mess
Go to Finder and hit keystrokes to empty the trash; without having to see the well-known confirm-or-not dialog box.