Gmail says my browser's cache is full. How do I fix this?
A full web browser cache can interfere with Gmail's features and performance. It might make the service slow or prevent you from downloading and viewing attachments. Here's how to clear your browser's cache in Internet Explorer:
Log out of your Gmail account, and close all other open browser windows.
Click the 'Tools' menu at the top of your browser, and select 'Internet Options.'
Click the 'General' tab at the top of the dialogue box.
Click 'Delete Files' under 'Temporary Internet files.'
Select 'Delete all offline content' by checking the box.
If you are using a browser other than Internet Explorer, please click here for instructions on clearing your browser's cache.
In some cases, it may be necessary to clear your browser's cache more than once and/or restart your computer to completely fix the problem.