Consider installing Fiberglass Reinforced Panels (FRP) without any soap dishes.

I just came up on my first year anniversary.

I am almost to my two year anniversary of being a landlord.

Now back off my soap box to answer your questions.

As tomorrow is my 4 year BP anniversary I looked up this post from last year and reflected on what an amazing journey it has been.https://www.biggerpockets.com/forums/223/topics/381564-omg-i-cant-believe-it-has-been-three-years-since-i-found-bpSince 2014 I have been involved in 59 purchases of 2-4 units in Chicago and Milwaukee.

I later figured out that the soap/shampoo over time reacts chemically with the copper line and corrodes it.That is all I can come up with at the moment, but gives you a few more ideas before you open up walls.

If there is any mold there, it's because the walls or pipes or conduit are dirty, and the mold is growing on that dirt.Dawn (or similar dish soaps) increase the surfactancy of water.

Congratulations on your 10 year anniversary!  

We don't manage in Seattle, but can definitely point you in the right direction to get you going with everything except sourcing the soap and towels haha.

Since I'm coming up on my 1 year anniversary of closing on my first property, I thought it might be useful to look back on how I've managed my properties.