MM submerged

[umanbean]

Anyway tried putting back the battery after about 10 minutes and it powered up.

It's a miracle that didn't fry it.

I see later in the thread you said you got it working - consider yourself lucky, very lucky.

The old bag of rice internet myth persists to this day and comes up in every thread where somebody dunks their electronics.

 

[umanbean]

Should I drop in rice?

No

Or just leave it out for a day to try before checking?

Several days would be even better, unless you put it in front of some moving air - fan or a/c vent works.