To clear the cache of your site, you have to follow the following steps.
Step-1: Go to the options of your browser (Chrome , Safari, Opera, Firefox 30+)
Step-2: Find the options named history
Step-3: click on the “Clear browsing data” button
Step-4: select the time from the drop down and also check the option “cached images an file”
Step-5: click on the button named “clear browser data”.