Brick is very easy to damage if your inexperienced. The motor between brick become brittle and break over time and it take experience to know how to clean without damaging your brick. Cleaning brick can be very dirty but the end results look amazing! Don’t hid that beautiful brick, let it show its beauty.
Damaging this brick is not very common unless they are already falling apart. It’s the motor between the brick that become cracked and brittle. I can’t simply run over the laid brick with a surface cleaning and call it a day. More times I am required to treat brick in a very time consuming manner to preserve the motor.