You seem to be forgetting it is your extraordinary claim so the burden of proof is actually on you to show there are actual chemtrails. Which no one in this thread has yet to have done. Asking for us to disprove something exists is absurd.

I might as well ask you to disprove there are invisible elves in my backyard.

Plus you have been given information on contrails, their formation, the variety they have, and all the factors that contribute to their formation/duration/appearance etc.

The fact you'd rather ignore it doesn't bode well for serious discussion.