CTRL-SHIFT-DELETE key combo will bring up the screen for clearing cache in any browser.
Click the Chrome menu Chrome menu on the browser toolbar.
Select Tools or More Tools.
Select Clear browsing data.
In the dialog that appears, select the checkboxes for the types of information that you want to remove.
Use the menu at the top to select the amount of data that you want to delete. Select "beginning of time" to delete everything.
Click Clear browsing data.