Tidda brake pads

[anio]

Hello,
I have Nissan Tiida 1.6 hatch (HR16DE). Four months ago I've changed my front brake pads but they squeaked so annoying so I went to the autoservice and they said that these pads are chinese low quality pads, they are very hard and could scratch my rotors. Last month I bought new EBC green and replaced the chinese pads.
The problem is that I am hearing this annoying noise again. The guys who replaced them said that the rotors are fine. Could you please tell me why is this happening?

P.S. This is my first post here A picture of my beauty:

Thanks!

[Athikerguy4life]

just gotta clean em once in awhile to get rid of the brake dust. Head down to the local auto parts store and grab a can of brake cleaner. It's a spray that'll get rid of the brake dust and it dries quickly so it won't hurt any of the other parts. Also, welcome to the forum!

[anio]

Thanks, Athikerguy4life! I didnt know that there is a break cleaner Its true that there is alot of black dust on the rims so I gotta clean it.

[Promise Land]

did you scuff the rotors or just add new pads to your glazed rotors? not scuffing them will make them squeal.

[anio]

did you scuff the rotors or just add new pads to your glazed rotors? not scuffing them will make them squeal.

No, I didnt but because I dint know. Is it too late now?

[Athikerguy4life]

did you scuff the rotors or just add new pads to your glazed rotors? not scuffing them will make them squeal.

how does one do this? I have never heard of this.