This is the link for an in expensive tool to keep us from having to get out and bang on the windshield wipers in the winter. I posted this once before to negative response but am going to try it again. We have had ours about a month and have just run in the rain. The plastic strip does not interfere with visibility and you don't even notice it. When the windshield wipers go over the strip there is no noise and no noticeable straining of the wiper. I also don't believe it is going to ruin the blade.
I am short and I drive at night and I do not like in the winter to pull off on an off ramp pray I am not going to get stuck then open my door stand on the steps and on each side of the truck and whack the windshield wipers. I feel as if this little very inexpensive object will keep me from having to do all of the above it is worth a fortune.