It may not matter at this point.
Water and electricity do not mix.
The damage has been done.
Even if you are able to get all the water to dry up in your iPad, and the iPad appears to still work OK, your iPad is on borrowed time, now.
If you haven't done so in the past, once this iPad is dry and if it is still working, best before going back to trying to regularly using it, backup this iPad to iCloud and/or iTunes on a real computer or other online, offsite, true data storage backup services like Google Drive/Photos, Flickr ( for images ), DropBox, BOX or other similar data storage services.
The reality is, now, that your iPad could fail at anytime, now.
Sorry & Best of Luck to You!