"It's...it's Johanna..." She muttered quietly, becoming self conscious. She knew that hoping that no one would notice her was just wishful thinking. Luckily all this guy wanted was to know how fix the coffee maker, which as luck would have it, she knew how to do. If she helped him he'd probably leave her alone, hopefully. 

"Shaking it a bit seems to work...but don't do it too fast..." At least that's what had worked for her earlier that morning. If that didn't fix it well, it would probably make sense to just get a new coffee maker.