Sorry I didn't see this until now. We did this with 2 different Striiv Play's at different times, and they are BOTH working good as new after allowing to air dry for 3 FULL DAYS, then recharging fully.
I'm probably too late to help the original poster on this topic, but hopefully someone else may be able to save theirs.
about 5 years ago
You're probably out of luck, but put it in a jar full of dry uncooked rice for several hours.