Anyone have tips on pressure washing Santa Fe barrel clay tile ? Am a little freaked out with relative asking me to *walk on* the roof as it looks to me very likely I would break a tile by just stepping on it. The roof is couple years old, not a single broken tile (verified with a drone) and has a little black algae on some spots, otherwise looks brand new. I know how to prepare a mild solution and I know how to keep the spray at least one foot off the surface (basically control the pressure point). It's the act of stepping on it that scares me. Any tips on how to step, ie. step on low spots or step on the top of the barrel curves, kind of shoes (or not?) to wear ?