We have a very shaded front brick porch on our new house. Over the last several months a very thick moss has developed on the bricks. The bricks are very rough and the moss is deep in the crevices.

I have taken bleach and a scrub brush to the bricks to try and get the moss off but it is a long and arm breaking process, and the moss doesn't want to seem to come out of the crevices.

Any suggestions, aside from renting a pressure washer, to get rid of the moss? Should I let the bleach sit on the brick, rather than scrubbing it? Any way to help prevent the moss from coming back?