Corroding at the edges

I probably should have read ALL the instructions on the washing machine before I took it apart. Still it was only a little flood.

More seriously I should have read and paid attention to the TOXIC material warning on the soda crystals before I made it into a solution and stuck my hands in it.

I didn't have a problem until Husband pointed the warning out, saying it was a mild corrosive. Now my hands are stinging and itching. Psychomatic? Or am I going rusty?