Identify the three transitions people miss
A dishwasher needs someone to start a load, recognize that the run is complete, and put the clean pieces away. Assigning someone to “handle dishes” leaves all three open to interpretation. Decide how a person approaching with one used mug can tell whether it belongs in the machine now.
Choose an indicator someone will maintain
Use a marker only if people will move it reliably. A label stuck on “clean” for three days creates more uncertainty than it removes. If nobody can identify the current state, clarify it together and simplify the routine rather than assigning blame for a crowded sink.
If you use a clean/dirty marker, agree exactly when it changes. The person unloading a clean load might reset it after the final dish goes away. Moving it halfway through unloading creates a different problem: another person may place a used plate beside clean dishes that are still inside.
Make room for exceptions
If some items stay out because of their care instructions, put them in an agreed place and name their owner. When a cycle finishes during a rushed morning, give the next person a clear update instead of letting them infer the state from a shut door. After a week, remove any signal nobody reliably updates.