how to clean greenhouse walls

[VickiC]

Hello everyone,
I need to clean my greenhouse walls (and poss. ceiling) on the inside. This will be my first time, so I need your advice as to what I should safely clean them with. The walls are Sunglo's double acrylic. I plan to move my orchids from one bench to the other bench (as well as under the bench) across the walkway before I clean the opposite wall. I haven't counted my plants lately, but I'm guessing I have somewhere around 150 out there now, more or less. I hope moving them from one side to the other is going to be feasible. If not, I guess I'll have to go back to the drawing board...or ask for your help again.

I will appreciate any advice that you can give to me.
Vicki