With about 32 batteries I can't afford to simonize them after each use and haven't found it makes much difference either. I clean the terminals when I can but have found that good battteries that don't leak are the best solution. If a battery is going to leak around the post it would need constant attention and I just don't have that much time.
I don't think washing and waxing the battery is going to make much difference in the life of it either, I can't see where wetting the terminals repeatedly is going to help things. A good corrosion/insulating spray when new is worthwhile though.
Jenk:
I guess if I had 32 pieces of equipment with batteries in them, battery maintenance would be pretty far down my list of things to do, too.
Your post prompted me to inventory my rolling stock, and I came up with seven batteries.
Two rigs see no winter use, so I remove the batteries and bring them inside for the winter.
Two see occasional use and I keep a battery tender on them.
The family car and my truck probably receive the least amount of attention (my bad).
My tractor is stored under a roof with two sides open.
I learned a long time ago that grease, road grime, water, etc. on the battery top will shorten its life.
It only takes a few seconds (about as long as it takes to check the oil level) to wipe the crud off the battery top and around the posts with a rag whenever I have the hood up (or the seat up, or the dump box up) on any of my rigs. You can even use the same rag you wiped your dipstick with.
YMMV