Scuba fins maintenance is pretty simple. Most people just throw them back into their scuba bag and pull them out right before their next dive.
I suggest that at a minimum you raise them off and give the fins and fin straps a visual inspection. The best time to inspect your equipment is right before you put it away after the dive. This will give you time to purchase a replacement strap or other items you made need. Since most divers only inspect their gear right before they hit the water, inspecting the scuba fins after the last dive will give you an additional inspection. A two time inspection procedure is always better than a one time inspection.
If you are going to store your scuba fins for a long period of time, I would suggest a thin layer of spray silicon to protect the rubber parts and do not store your equipment near a gas water heater of furnace. Gas appliances tend to increase the ozone around themselves, ozone is the death of rubber parts. Try not to stack your fins vertical, but lay them down flat. You will want to avoid deforming the shape over a long period of time; deformed fins will not operate as efficiently as they were originally intended.
Keep your save-a-dive kit updated. Having the wrong style fin strap really does not do anyone any good. I recommend, buying a spare fin strap after one year of using your new fins. Breaking your replacement strap at the same time as your original strap will put a dent in your diving plans. Finally, write your name on your fins. I like to use BIG letters. You want to be able to see the writing from across the dock; it will keep mistakes from happening.
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