Strange Keyboard Issue

Out of nowhere, my low C and high Eb trigger at the same time more often than not, and the low C gets stuck notes.

I tried taking off the respective keys and found no dust. The issue stopped for a short time but eventually came back.

Anyone else had this issue? Any fix tips?
I sent a support email to TE, and I might try a factory reset in desparation. Its a year past the 1 year warranty and $85 + shipping is steep for a random issue that came out of normal use of a machine I took care of.