I have discovered another way to kill squash bugs:
7th generation Dish liquid, free and clear: https://www.seventhgeneration.com/dish-soap?vT
I ran out of my chrysanthemum spray, so I mixed up a bottle of 7th gen disk and water. Wow, one spray and 20 seconds later they are dead! Work on earwigs too.
Never had much luck with Safe Choice as an insecticidal soap.
Since the big squash bugs love it down by the stems, I have taken to spraying the stems before wand watering. They have to mosey up through the soap suds. And they are dead!
I was really surprised at how deadly this stuff is! Mixed two squirt to a quart of water.