I've sprayed them with various insecticides, including "Wasp & Hornet Killer", and the damn things just brush it off and fly away.
They're not of this Earth ...
My mom keeps a lidded jar half filled with vinegar and goes around the windows of her house with a hand brush looking for them. Just sweeps them in and clamps the lid down tight whenever she finds one. And, where there’s one there are more. She’s tried everything to be rid of them, but they come back. Great house, beautiful, love it, wouldn’t trade it for anything else. But, they’re in there, apparently to stay. Exterminators say they work their way into the insulation somehow.
Toilet is the best destination for the stink bug, IMO.
I started keeping bees so I am very biased when it comes to insects. I dont like wasps and yellowjackets.