Ps4 analogue drifting solder does not melt

Hi friends, maybe you guys can help, i am having a situation, i can´t fix ps4 analogue drift because i am not able to melt the solder, tried adding a bit then desolder it doesn´t work,with the wick same thing, i could solder the motors with no problems though. With the same solder iron i am able to fix xbox 360, xbox one controllers easily.Why is that?Can anyone help?i would like to fix ps4 controllers =(.