Chosen Solution
So, about a month ago, I spilled about 1/5th of a glass of water on my Logitech K120 keyboard. I immediately disassembled it and removed any water that was in there. After I reassembled it, every key worked flawlessly but it felt really mushy. The keys didn’t spring back up after a keypress. So I got a new one and I was wondering if I could fix it to use it with my also water damaged late 2007 Macbook. Does anyone have any suggestions? (Sorry for my bad english)
Check the rubber membrane. It sounds like the membrane might be a little ripped or positioned incorrectly.