My ICE 1999 F150 had the same problem. My mechanic HIGHLY suggested dryer sheets, the smelliest you can find. I tied them everywhere on the outside (as not to be seen) and problem solved. Replaced every 6 months. Having said that, I’ve not done this with lightning. I’ve been watching and...
10’ is barely enough. 13’-14’ optimal. I’ve 14’, it’s perfect as I have a tight space as well. The 14’ gives me wiggle room in the winter when weather conditions are not optimal, I’m tired or just lazy. The cameras are fantastic!