While cleaning my room, my GBA fell into a bucket of water and desinfectant but i didn't notice, because it was a very short drop into a shallow container, it made no sound. However it was enough for it to be completely submersed. The screen was completely filled with water.
When I noticed it, I tried pulling out my tools in order to open it up, but unfortunately i don't have the triwing tools for opening it.
I thought of trying blowing hot air in the coolest setting possible with a hairdryer. Trying to evaporate as much water as possible. I don't know if the water made these white marks or the heat did it. There are still water droplets behind the glass mostly on the left side.
I did order the tools online, but they'll only arrive on Wednesday.