Please don't make duplicate posts. Using PM is irritating.
A photo would be helpful.
TFT panels get upset by liquids. I cleaned the back of a TFT panel with some alcohol to remove the sticky foam mounting tape. The display still "works" but is blotchy from the liquid ingress.
I am not a mobile phone user. But billions exist all over the world. I am sure that many phone screens have met water, alcohol, cleaning chemicals, ...
If the display looks unsightly, replace it with a new TFT panel.
David.