I'm going to qualify my post by saying that I restored water damaged cell phones for years.
With that said, rice does almost nothing. You'll have water in the housing and rice won't extract that. The best thing to do is remove the battery, hold the fob in your hand battery side out (finger side) and swing it like you're throwing a ball. You want any remaining water to fly out, or at least as much as possible.
If the cases on these snap open that's the best plan of attack and will allow you to remove every last drop.
From there you want to hit it with a hair dryer but not sustained. Hit it for 5 - 10 seconds from about 8 - 10 inches away, give it a break, rinse (not literally) and repeat.
The good news is you're dealing with fresh water and this is a low voltage device. So proper drying should restore it.