Touchscreen doesn't work, after waterdamage

Since you phone seemingly survived severe water damage I’m surprised it’s even turning on right now.

Steps to take are:

1. opening it up
2. checking if the battery has bubbled up
3. if so remove it carefully!
4. dispose it the intended way (be careful it can be prone to “explode” / secure it into something that is fire resistant upon disposal)
5. removing every little part from you phone
6. drying the !&&* out of it
7. checking every little contact for corrosion (especially the circuit boards)
8. put everything back together and replace the broken screen on your way out

In my opinion it would be easier to just buy a new one - these things go for cheap on eBay and are easily repairable.

I can’t stress the danger of a shorted battery enough - if it’s getting bigger as you’re handling it throw it the f*** away from you, ideally somewhere where nothing else can catch on and start a fire.