Back in the 80's there was a customer that I always had to visit at least once every summer. Their dish was grounded to a ground rod driven in the ground out at the dish. After a strike and a receiver replacement I recommended a Panamax. I installed it and never heard anything from them until the next summer. They had taken another hit, and when I was checking out the equipment I shook the surge protector and heard parts and pieces rattling around inside. All the equipment worked fine when plugged directly into the outlet, so I took the Panamax outside and took the cover off and poured a handful of ashes out of it. I installed another surge protector and decided to take the ground wire loose from the dish. I never had to go back again...