Sensor cleaning question

[I @ M]

Then I locked the mirror up, and carefully applied a drop of pure ethanol to the middle of the sensor; placed the piece of lens cloth on the sensor face and used a water colour paint brush, washed in ethanol, to wipe the cloth gently over the sensor. I kept working it around until the ethanol was dried; turned the camera face downward to tip out the cloth, then released the mirror. Results are almost perfect.

Did the ethanol take all the special coating off your AA filter or did it leave some in place?

There's one tiny spot wandering around but it's loose.

Might be a bit of that pesky filter coating that the ethanol didn't dissolve.