My wife figured this out, though both of us should have known. We visited my in-laws in rural Georgia and our 17-month old son was covered in gnats and mosquito

My wife figured this out, though both of us should have known. We visited my in-laws in rural Georgia and our 17-month old son was covered in gnats and mosquitos when we went outside so we limited his time. When we went to the beach, there were no insects and my wife said, "must be the breeze. We should get a fan for our porch when we get home" Luckily she is smart or my son would suffer a lot!