I gave up trying to explain the same to my sister. Now I just mock her when she brings it up.
Ask her if she thinks the car in front of her in very cold weather is spewing chemtrails.
I actually call them dumb asses when they bring it up in the local coffee shop we sometimes gather at in the morning.
BTW. These assholes caused Kelly Ward to lose the primary to John McCain.
Here’s the thing you mock your sister for likely just being observant and having the common sense to look up at the sky. Its not rocket science.
Mr.GG2 is a former multi engine pilot as in small commercial jets and cargo jets. He worked at Lockheed building 747’s. He’s also familiar with military aircraft. He says there is no way a jet contrail sticks around for hours on end becoming wider and wider. There is no humidity or atmospheric pressure that makes that happen. Jet planes don’t fly around at 8,000 -10,000 ft in erratic criss cross patterns. As far as I know there are no slow motion dog fights going on over Lilburn, GA. :-)