rear shocks b4

hi lads
my rear shocks make a creeking sound .. i got a tube and attached it on to a spray grease can. put it up under the plastic cover on the shock and let the grease fly . now this only stops the creeking for a few weeks .. car passed nct so i think shocks are ok .. i heard before thats its common enough on the sti,s .? anyone got any brain wave for me ? pain greasing them every few weeks
damo

Try silicone spray, the one that lub's rubber's etc. If works sometimes.

John