But here in Michigan, I have the miracle cure that's been in our family medicine chests for generations: Fels-Naptha laundry soap. It says it's "Ideal For Pre-Treating Stains" but I've never seen anyone in my family actually use it on laundry. We wet the end of the bar and rub it on insect bites to take away the itch. Now, by way of disclaimer, the label cautions that Fels-Naptha is an eye and skin irritant. I guess if your skin is already irritated, that doesn't matter. At least it didn't matter to my Grandma. And Grandma was always right about everything.