Since these hose connections are exposed to the elements under the car, and up near the wheels, they often get sprayed with water, road salt, and other corrosive materials.

In an effort to ease the removal of these hoses each of the connection points should be sprayed thoroughly with a penetrating lubricant.

Note that where the soft hose connects to the hard line the threaded area is between the lower and upper pieces of the bracket. This is the place to focus the spray of the penetrating lubricant.