The side sprayer is not able to shut off completely.
The side sprayer would need to be replaced. It is imperative to identify your model because the side sprays are unique to certain models. To determine your model, please see our Find Your Product section. It is also recommended that you look underneath the sink to view the connection of the side spray hose to the discharge tube of the faucet. It is possible to have either a threaded connection (identified by a metal nut at the end of the hose) or our Hydrolock connection (a black piece with a white clip at the end of the hose) on the side sprayer hose. Make sure the correct connection type is obtained for your faucet.