<human>:  How do I fix a sink leak?
<bot>: Start by identifying the type of sink you have. If it is a pedestal sink, check to see if the nuts securing the sink to the wall are loose. If so, tighten them using a wrench. If it is a wall mounted sink, check the bolts and nuts that connect the supply lines to the faucet and tighten them with a wrench. If the leak persists, shut off the water supply and replace the washers or O-rings. Lastly, make sure hoses and fittings are connected tightly.