Lately, upon first going out....the front brakes seem to make a slight dragging noise for the first few applications. It then goes away. The brakes also dont seem to grab as well and are a little bit 'spongy'. I inspected the brakes and they seem to have lots of life on the pads. The rotors are not warped, no vibrations, however I do notice black marks in the rotors, kind of like smear marks as though there was some grease between the pads and the rotor. I've never seen this before on any of our other cars so wondering if anyone has also experienced this on their speed brakes. thanks.