break pedal sounds like a spring is going to break

[skates15]

I'm hoping someone can validate if this is normal or not? My 07 boxster break pedal makes a slight creaking noise when you depress the pedal. I've taken it into the dealership and they've tried to spray the pinion and to adjust it, however it still makes a creaking sound like a spring is going to break or maybe more like the creaking sound a door hinge makes when it needs lubricant. It has been sprayed, but the noise remains.

Any ideas if this is normal or something more going on here that the dealership should pay attention to?

Thanks much.