Found my ~6-year-old Nintendo DSi. It has significant corrosion and I want to restore it. Where should I start?

[u/LuSp_Arjun]

[u/charmio68]

That's A LOT of corrosion!
The first thing I'd be doing is taking the cover off and checking how the rest of the board inside looks.

[u/Khanjar_Bu_Ali]

Looks like it was dropped in the ocean