iPad Pro 11 keyboards non Responsive

After trying to get my last Smart Keyboard replaced at Apple, They declined. I searched YouTube and foun some interesting video of them repairing the first Generation keyboard. I decided to pull my fabric back off my keyboard. The three conductive tape strips all are green, which is from corrosion. I have four of these keyboards. When I get home, I will check the others. I am very disappointed that a $200 Apple keyboard is built like this. I do not recommend buying one of these from Apple, unless they can prove they changed the conductive tape to something more corrosion resistant.