i have an 08 535i nd i changed my b brakes about a month ago. i put factory oem brake pads on. the last week or so ive been getting this loud screeching sound coming from my front driver side tire every time i press on my breakes, sometimes the sound lasts even after releasing the breaks. my pads r still good. i wanna take the brake caliper off the disc nd clean all the parts. also my break pedal is almost touching the back so i need more brake fluid as well. what should i do...help!!!