Dreams about returning to a previous workplace often reflect unresolved feelings or experiences related to that environment. In your case, the crowded, confusing, and disorganized setting may symbolize feelings of overwhelm or lack of clarity in your current life situation.

Taking control and instructing others suggests a desire for leadership and the ability to create order from chaos. This can indicate a need to assert your skills and knowledge in your waking life, possibly in your current job or personal situations where you feel things are disorganized.

The act of throwing out dirty and spot-covered glasses signifies a desire to cleanse or eliminate negativity and clutter from your life. It could represent letting go of old habits, relationships, or situations that no longer serve you.

Overall, this dream may be encouraging you to take charge of your current circumstances, simplify your life, and make necessary changes to foster a more organized and clear environment. Consider what aspects of your life might benefit from this control and clarity.