I flushed the brake system using the 7-point procedure as a regular maintenance item. I had no previous braking issues but afterward there was very little play in the front brake handle and now the front brakes drag. I can decompress them a little using a screwdriver as a wedge and the tire spins freely until I apply the brakes again then they drag. Rear brake is fine and if I only use the rear brake the front ones do not drag. Could I have gotten contaminant in the front master cylinder when I wiped it clean that prevents it from operating properly? Is my first step to rebuild the front master cylinder? Thank you!