5diii and salt question

Hi guys,
I had a question regarding exposure of a 5diii to salt.

I took mine to the beach yesterday even though I was really careful (no liquid on it, cleaned my hands with fresh water every time before holding it, kept it in the camera bag hung on a tree......) I could not avoid to have a little salt on it.

Back home I wiped it well but I still see tiny crystals there and there. Specially on rubber parts like grip. It's very little.

Should I worry about that or am I being too paranoid?