What's the best way to stop squeeking brakes? My pads are in good condition and so are my rotors. They just squeek a lot lately. Should I use a "stop squeek" product? And if so, will I have to remove the calipers to apply it?

Buy a new shim kit from Nissan. You can use the anti squeal stuff on the back of the pads when you put the new shims on just to be safe.

That should quiet things down.