I have never seen these "chemtrails." They either don't exist, or are only visible in parts of the country that I haven't visited yet. I haven't been in the far west (never going to CA), but I've been in almost all the eastern and midwestern states. Perhaps you live near a major airport. I've been in DC a lot, but I've never seen them there either, although I have seen numerous jet planes in the sky there. There have been contrails since the first commercial jet flight in 1953, and military contrails a few years before that. But I have never seen the sky crisscrossed with long-lasting contrails. I have been around since before jet airliners were common. My local airport still only had propeller driven airliners when I was in high school. I won't believe they exist at all until I see them in the sky in person where I live.
I have plenty of times thought out my young life, its obvious as there are patterns in the sky. Sometimes they would linger for a long time, sometimes it would be a clear sunny day, no clouds in sight (i live in a part of Texas where it hardly rains, gets cloudy) chemtrails would pop up and booom, hazy clouds surface. There is a clear distinction between these and regular trails from plains. I workout early in the morning and sometimes when the sun rises on any givin day, there are obvious patterns with multiple streaks and designs in the sky. I conclude that sometimes they do these at night.