Brakes locking up. 2003 Civic
 

After about 10 to 15 minutes of driving the front brakes will start to drag. After another 5 minutes they will release a bit but still have a little drag or sometimes they will release all the way.
Where to start?

welcome to the forum. Check your calipers guide/return rods for proper lube. these are usually under the rubber boots..

Probably something to do with brake fluids. Good luck.