I kept my first strop ( SRD latigo) hanging on the wall opposite the sink for 4 years and is still fine. I have a well ventilated bathroom as well. I now store them all in my razor shop that's the third bay of my 3 car garage. I keep the temp pretty much the same year round in there. Like mentioned above as long as you don't get large amount of water or other liquids on the strop should be fine IMO..

Matt...