Here is how to accomplish this.
1) Bring up IE11
2) With IE in focus, hit the F12 key
3) This will start the Developer Tools in a different window
4) Click on the "Network" tab of the Developer Tools window
5) As you hover the mouse in the Toolbar (start with the green arrow, the fourth Icon should indicate "Clear Browser Cache..."
6) Click that Icon.
7) Logon to Web Viewer