1. Click the Chrome menu  on the browser toolbar.
2. Select Tools.
3. Select Clear browsing data.
4. In the dialog that appears, select the checkboxes for Delete cookies and Empty the cache.
5. Use the menu at the top to select the amount of data that you want to delete. Select beginning of time to delete everything.
6. Click Clear browsing data.

Instructions from Google Support.

1. Click the menu button  and choose Options

2. Select the Advanced panel.
3. Click on the Network tab.
4. In the Cached Web Content section, click Clear Now.

Instructions from Mozilla Support.

1. Click on the gear wheel in the top right corner.
2. Click on Safety in the menu
3. Click on Delete browsing history in the submenu
4. Select Temporary Internet files and website files from the list
5. Click on Delete

Instructions from Refresh Your Cache.

1. Click on Safari in the top left corner and then click on Empty cache…
2. Click on the Empty button
3. Click on the refresh icon

Instructions from Refresh Your Cache.

For iOS 8

1. Go to your Home screen.
2. Click Settings. 
3. Select Safari.
4. Click Clear History and Website Data.

1. Launch Chrome and click the menu icon in the top right corner.
2. Click on Settings.
3. Select Privacy.
4. At the bottom on your screen click Clear Browsing Data.
5. In the dialog that appears, select the checkboxes for Clear the cache and Clear cookies, site data.
6. Click Clear.