I think you have to keep water away, or at least not spray high pressure water, from the hubs, the bottom bracket, the headset.
I wipe off the water with chamios..
You can use dishwashing detergent on your chains to clean them... And apply some lubricant on the links and wipe it off with a piece of cloth to keep dirt away..
If ever, water had sip in your hubs.. You have to repack the bearings.. So, if your bearings are not sealed.. Keep it away from water..
You can apply wax on your bike when your done to make it shiny.