I know that this question was asked so many times when I read all the answers, but no one gave me a complete solution. If Android 6+ does not allow you to clear all application cache data, then how does the Clean Master application work. Android added this permission to the Signature | Prvilege, then how to access. Please help.
Go to the storage section in the settings. Click Internal Storage. Find the Cached data and click on it. You will then receive a popup to clear all cached data for all applications. This will remove a ton of old data.