The dishwasher has a small cup in the corner

For Soap Dispensers:

Remove the cap or cover on the small cup. Pour liquid soap directly into the port. Avoid overfilling to prevent spills.
For Air Gaps:

Ensure the gap is clear of debris or blockages to maintain proper functionality. If water spills out, it might indicate a clogged dishwasher drain that needs cleaning.
Why Is It Important? Convenience: For soap dispensers, it saves time and avoids the hassle of accessing the underside of the sink. Health and Safety: If it’s an air gap, it ensures proper drainage, maintaining a sanitary kitchen environment.
Tips for Maintenance Clean the port or air gap regularly to prevent buildup. Use the appropriate soap for dispensers—dish soap for dishes and hand soap for handwashing. Check the dishwasher’s drainage system if the air gap overflows.