If glassware becomes unduly clouded or dirty or contains coagulated organic matter, it must be cleansed with chromic acid cleaning solution.

How do you clean test tubes?

Use test tube brushes with soapy water to clean inside test tubes or beakers; use sponges to clean inside beakers. Rinse well.

Why is it important to clean the laboratory after every experiment?

When a lab receives a thorough cleaning, you ensure that the work zone is free of debris and clutter. Nothing is worse or more depressing than trying to conduct serious experiments and research in an untidy area. It can create unnecessary stress if you are already under pressure to produce results in a timely manner.