Ventilation advice has to be balanced with access by children and pets. An open drum should never be treated as a harmless storage or play space.
Understanding this situation
Follow the model's maintenance guidance and keep the surrounding area supervised as necessary. The useful goal is managing residual moisture, not leaving a door projecting into a walkway or creating an accessible hiding place.
A useful next step
Before any load, check the drum and keep detergent stored safely. If leaving the door ajar is unsuitable in the household, ask the manufacturer about appropriate maintenance arrangements rather than using a makeshift door stop that could damage the hinge or closure.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.