Mobile
Step 1: In the Silk Browser, go to Menu > Settings > Privacy and tap Clear browsing data.
Step 2: Uncheck Browsing history and Cookies and site data and check Cached images and files. Then, tap Clear data.
Desktop
Open settings — Click the button with three bars in the upper-right corner of the browser window, and select Options from the resulting drop-down menu.
Clear the browser cache — Click the Privacy and Security tab on the right of the navigation bar and go to the Cookies and Site Data section below. Click the button labeled Clear Data, check Cached Web Content, and press Clear.