Today I learned a new word: "zerk" browsing the threads 
Yesterday i changed the engine oil (Mobil1 0W-40) and filter (Mann), and greased the driveshafts. Almost everything went well, but the last zerk leaked grease after lubing it. It stopped when the excess pressure was leveled, but I don't know if it will be spitting the grease until there is none left. Is this something that needs to be immediately replaced? Is this a standard part or should I take the old one to the parts shop as a sample?
Or should I just try to clean it from anything that may be obstructing it?
TIA.

Yesterday i changed the engine oil (Mobil1 0W-40) and filter (Mann), and greased the driveshafts. Almost everything went well, but the last zerk leaked grease after lubing it. It stopped when the excess pressure was leveled, but I don't know if it will be spitting the grease until there is none left. Is this something that needs to be immediately replaced? Is this a standard part or should I take the old one to the parts shop as a sample?
Or should I just try to clean it from anything that may be obstructing it?
TIA.