Jammed Lotion Pump
Cause: It's either a clog (a bit of lotion in the hole of the pump has hardened) or a pump defect (one of the mechanism's many parts is misaligned), which causes the whole gizmo to fail, says president and CEO of MD Skincare Carrie Gross.
Cure: If a clump is the issue, run the pump under hot water, then use a toothpick, a needle, or a bobby pin to dig the blockage out of the hole. If this doesn't work, and the pump itself is the cause, take it out and pour the lotion into a plastic cosmetics bottle (available at drugstores).
Preventive tip: After each use, wipe away any lotion sitting at the tip of the pump with a cotton swab.