<human>:  How can I best fix a clogged drain?
<bot>: The most effective way to fix a clogged drain is to first try using a plunger. If this doesn't work, you can use a chemical drain cleaner or try to manually remove the obstruction with a drain snake. If all of these methods fail to clear the clog, you may need to call a plumber to inspect the drain and clear the obstruction.