I live in a place that has normally clear blue skies. Then they were streaked for years. There is an air base near by. Just noticing now that we are back to clear blue skies. No streaks.
Might be something, might not be.
If you want to know about contrails, go hang out on CBTS for a while. Those people are all in on that.
I don't know that much about it one way or another, have seen pictures of the planes they supposedly use to poison the masses but that's about the extent of what I know about it.