I have the same problem, first it was the zero key 0, which I think I spilled on, and then just recently 7, U, J, M and I didn’t spill on those but they just stopped working. The funny thing is that they do sense it when I press them, their junctions have changed. For M, it would hide whatever I am working on. When I press 7 a few times, “12345” would appear. This “IOUYIOqqwOeqwIOU” comes out when I press U key repeatedly. When I press J key repeatedly, “adfghsadfgsadfgsadfghs” comes out.