Sridhar Ananthanarayanan, Jun 26, 2019 : A clean install (of any rom, doesn’t matter) involves wiping the following 4 partitions via TWRP: 1. System (wipes the OS) 2. Data (wipes all apps and their data) 3. Dalvik (wipes the Dalvik/ ART files) 4. Cache (wipes the cache partition) If you are sideloading via ADB/ USB OTG, you can also wipe the Internal Storage partition, but this will wipe everything on your device so take a backup beforehand. The process is always the same for ALL ROMs.