Noticed on my second set of patio furniture which is less than a week old that I have burn marks on my patio furniture cushions. They are nearly a foot long and bad enough i have to dispose of my cushions. I though my old set someone had accidently spilled grease on them or something and in the sun they melted the fabric as the cushions were old. However in less than a week on my new cushions I noticed on large long burn looking mark at an angle. Then I noticed a few strips of dead or dying grass at the same angle next to the chair. The angle is suggesting a neighbor who we don’t talk to but have had issues with on noise complaints is spraying them. They would have to shoot the stuff about 25 feet or more over their fence. Don’t want to point fingers but its scary as I have small children and its very odd. Any suggestions or advice or what this chemical burn could be from?