Cleaning gutter guard before use??

[Delphinus]

I'm not sure what to suggest, but I suppose if in doubt, don't use it. You'd think it wouldn't be too toxic because anything it releases or gases off would just run off into the storm sewers and eventually rivers and so on. Maybe let it sit in a well ventilated spot for a few days and see if it still stinks? Maybe it's just that "new vinyl smell" ??