My wife's E01 has had an alkaline AAA battery leak inside of it, and the leak left a streak of white residue that is preventing new AAA battery from fitting properly and working.
How can I remove the leak residue? It's a tough place to reach because the residue is near the end of the tube and the tube is so small. Plus I don't know what type of cleaner can dissolve / remove the residue. It's dried/stuck on and not easily scraped off.