I have had a similar issue, and indeed the same keys. I had touchpad issue, cleaned the keyboard with a damp sponge, and had problems with T and G. I put it in the sunshine with some rice on the keys, and that fixed it for awhile. Next day it was failing again, so I tried a blow dryer. That fixed it for two days, then suddenly it failed again, this time the entire column: 5, T, G, and B. The failure is that when the key is hit, a stream of characters is generated, including those associated with keys to the left. For example, if I hit "5", I might get something related to "12345". Similar with the other keys, although sometimes "opt" characters are generated, for example "delta" when I hit "G". After this latest failure, it's simply not improving. I tried popping out the offending keys and the underlying support hardware, then wiping it with some isopropyl with a swab, and while that cleaned off some dirt, functionality is the same. Apple told me I needed to replace the entire keyboard hardware for $199, a...