On my LG, it is Settings> General> Accessibility> at the bottom, find Services, and listed there is CCleaner. Select, and turn ON if you would like CCleaner to "deep clean".
After I did it, I got a black screen for longer than I expected. My phone restarted & I took away permission. Not sure if I'd recommend the deep clean without more information about what it is really doing.
How to give permission for Deep Clean
in CCleaner for Android
Posted
On my LG, it is Settings> General> Accessibility> at the bottom, find Services, and listed there is CCleaner. Select, and turn ON if you would like CCleaner to "deep clean".
After I did it, I got a black screen for longer than I expected. My phone restarted & I took away permission. Not sure if I'd recommend the deep clean without more information about what it is really doing.
Good luck!