NOT salt, ceramic fragments from car spark plugs mixed with saliva.

More @ https://bit.ly/3iTJQWa (Google Translate).

(Google Translate version of “[SALAH] Memecahkan Kaca Mobil dengan Garam dan Air Liur” https://bit.ly/2FLP4VR).

REFERENCE

https://bit.ly/3iZyxfg
https://bit.ly/3kGTGLC
https://www.youtube.com/watch?v=fZdLIGhY1s4