Despite repeated (kind, directed at everyone) requests to not leave things around, the introduction of a cleaning rota and everyone ekse doing their share, one of my housemates continues to leave a small pile of their unwashed things in the kitchen every day. They start work at midday so have the chance to have a fairly leisurely morning yet never ever wash up after them themselves until either late that evening or the next day - at which point the cycle starts again 
The rest of the kitchen is spotless btw.
Aibu to be annoyed? Or do I need to live and let live??