Don't suppose this is the answer your looking for, but...
I too used to work in a meat processing plant, with an 8 hour night shift power hosing everthing.
After many painful months of trying to prevent water ingress to connectors, sockets, light switches (they used to turn these on and off with the 110bar pressure washers to save un-gloving their hands!), we found the most effective solution was to re-train the washing operatives and then enforce a strict disciplinary procedure for any damage caused.
Probably not legal but it reduced "drying out times" by 50% each morning!