Wastegate and AI

I just wanted to post the pic of what was happening with the Wastegate. One night, while boosting, It seemed like the wastegate wasn't opening. We took it apart to see a little corrosion inside. Not much, as you can see. But apparently some of the methanol has left traces here. I wonder if that little bit could cause the wastegate to stick....? It seems unlikely, but after cleaning it off, the problem stopped....???