It may be because the nozzle of the spray bottle is blocked by foreign objects. If there are many attachments on the nozzle of the spray bottle, we can scrub the nozzle with a towel. If there are particles drilling into the nozzle hole, we can pick them out with fine things.

It may be because the parts of the water pump are broken. We can check the components that make up the pump. If possible, we need to repair the pump. If the pump can't be repaired, we need a new spray bottle.