A mechanic just greased my driveshaft not too long ago and confirmed none of the zerk fittings are clogged or went bad.

however I’m struggling to get my damn grease gun to actually pump grease into some of the zerk fitting.

A few zerks were very easy, just plug and pump, but the others will not accept any and grease just gets all over the place. Please help. What are some common tips that could help what I’m doing wrong