ok can see its a closed cartridge but refillable wear the pointy rod came out, would imagine it has lost some fluid, you will need to hold it up right and gently feed in oil a bit at a time and pump the rod up and down to let air bubbles raise to the suface, you should see them if you look down the hole your pouring into with a syringe (without a needle ) or similar small pourinf squirting in device.