i need some advise.. last year, my brake got screeching sound during braking. already change brake pad (oem) and disc scheming (at SC). didn't really solve the problem, only reduce the sound. now the sound become loud again. they ask me to do scheming again.. every year must do it??!

actually i read somewhere it's the clip problem. i don't know true or not. but nobody can solve my problem yet.. and i don't trust SC anymore..