Key left out in rain overnight.

[Rampage]

Hi, our Leon 2019 key was left out in the rain overnight.
I've removed the battery and put it in rice in a sealed container.
Anything else I should do?
Will removing the battery mean I have to buy a new ECU or something stupid from Seat?

 

[BigJase88]

Keep key in the rice for a few days. If it doesn't work it's dead and new key and coding required

 

[andylong]

If you are up to it split the case and dry it open. Thats what I would fo. The electronics should have coating to protect it from moisture, but not immersion.
The key once coded doesn't need to be coded again.
You'll find videos on how to open up your key and take the few parts that are inside out of the case.
Don't heat it above 40c or so, certainly not on a radiator.
Packing the key in a bag of rice will lower the humidity and help it to dry, but if it's wet inside then it will take a long time.