Thanks JCL
Thanks for the feedback. I agree that making modifications to the top spoiler is probably not going to work. However, I am a tinkerer and will see if improvements can be obtained with small modifications. If results show an improvement I'll post.

I have been using the intermittent wiper with limited success. Most times I wind up with a clean semicircle surrounded with sludge.
I have used Rain-X which helps a little but not to the extent I was hoping.

All the best!