(This is only tangentially related to brewing by virtue of Starsan and PWB - feel free to close if this is inappropriate)
I have an evaporative cooler, better known as a swamp cooler, that I use in place of AC. It works by drawing water onto a particular material and then blowing a fan across the wet material; the evporation has a localized cooling effect. We use the same principal to keep our fermentation temperatures down if we don't have a fermentation refrigerator.
I haven't turned it on since last summer and figure it could be somewhat dirty-- at the minimum, some organic material, and at the maximum, some gross infection.
Would it be fine for me to run water with PRB and/or starsan in it to clean it out?