The kind and degree of the obstruction determine the most effective drain-cleaning technique. While commercial drain cleaners may dissolve some materials, plungers are effective and safer for clearing basic obstructions. Professional plumbers frequently employ instruments like drain snakes or hydro-jetting for complete cleaning when dealing with more difficult or complex obstructions. Over time, preventive action like routine cleaning and refraining from putting specific items down the drain helps to keep drains clear and effective.