A few months ago was Victoria Day here in Canada and some friends and I lit fireworks. I had bought them and placed them in my bag. One of them was damaged and spilt firework powder in my bad and some got on/in my laptop.
It's been many weeks since and I may have to unexpectedly fly out of the country, crossing over to the US. Should I bring that laptop? Will it set off anything at any border agency? I'm not Canadian nor American.