Never had a problem removing mine mate. Need to be firm with it but not hit hard. I few taps loosen it up nicely. I actually used a 5mm drill bit n hammer t knock them out - worked a charm! I did mine after 18mths and 15,000 miles, but sayin that I dunno if they had been done before I bought the car so it could well be 3yrs and 28,000 in all honesty!