On the Debug -> Cache items tab, you can see which Keys and Dummy keys are currently stored in the system cache. By clicking the View object () icon, you can display details of the cached object in a new window.
Both real and dummy keys can be deleted from within this part of the user interface using the Delete () icon next to them. All dummy keys can be cleared from the cache using the Clear cache button.
For more information about debugging in Kentico CMS, please refer to Developer's Guide -> Development -> Debugging and system information. For more information about caching in Kentico CMS, please refer to Developer's Guide -> Development -> Caching and performance -> Caching options.