<human>:  How can I fix a clogged drain?
<bot>: One way to fix a clogged drain is to use a plunger. Start by forcing some air down the drain then forcing the plunger up and down repeatedly until the water flows freely. You can also try using a drain snake, which is essentially a long, flexible rod that is inserted down the pipe to clear out any obstructions. You can also try using a chemical drain cleaner or boiling water to try and clear the clog.