Blank board, one line each: what are you stuck on?

Board's still empty. That's fine. Somebody has to go first, and it might as well be a question.
One line. What are you stuck on right now? Doesn't have to make sense. Doesn't have to be about anything I sell. Just the thing that keeps coming back when you're not looking at it.
I'm reading, not collecting. Nobody gets enrolled off this thread. I'll just listen and see what's actually in the way.
Also, the tin in the basement is still shut. Nobody's opened it yet, so I'm leaving it alone for now.