Each time you access a file through your web browser, the browser caches (i.e., stores) it. By doing this, the browser doesn't have to newly retrieve files (including any images) from the remote web site each time you click Back or Forward. You may want to periodically clear the cache to allow your browser to function more efficiently.
First, force your browser to do a complete, 'hard' refresh by pressing Ctrl-F5 on a PC (Command-R on a Mac).
Then, if that doesn't help, to clear your cache, the instructions differ by browser:
For Chrome, in the browser bar, enter chrome://settings/clearBrowserData. Select the items you want to clear (e.g., Clear browsing history, Clear download history, Empty the cache, Delete cookies and other site and plug-in data). From the Obliterate the following items from: drop-down menu, you can choose the period of time for which you want to clear cached information. To clear your entire cache, select the beginning of time. Please note that this could potentially remove all cookies so it's important to be clear with your chosen options.
For Internet Explorer, Click Tools, and select Delete Browsing History. Deselect Preserve Favorites website data, and select Temporary Internet files, Cookies, and History. Click Delete.
For Firefox, from the Tools or History menu, select Clear Recent History. If the menu bar is hidden, press Alt to make it visible. From the Time range to clear: drop-down menu, select the desired range; to clear your entire cache, select Everything. Click the down arrow next to "Details" to choose which elements of the history to clear. Click Clear Now.
For an Ipad/Iphone, here are some instructions.
When troubleshooting issues with any web site, exit your browser completely before attempting to access the site again. In Windows, close all your browser windows; in Mac OS X, quit (
Command-q) your browser.
To clear the Safari Cache on your iPad, you would need to complete the following steps:
Here are some instructions for alternative browsers.