I was recently digging through some old boxes looking for old LEGO bricks I had as a kid. In two of the boxes I found old double A batteries that had busted (the boxes were in a building that has got hot during the summer). Well in the corners of the plastic boxes I found brown dust. I'm thinking this might be lead dioxide from the exploded batteries. I also burnt my hand accidentally touching one of the exploded batteries. Am I right in this assumption? Is there a way to clean the bricks by soaking them in water with a chemical (baking soda)?
Any advice would be appreciated I just don't won't to lose these LEGO bricks.