Coralife UV sterilizer bulb issue

[Midway]

I'm looking for some input on this Coralife super twister UV sterilizer. I got an ick issue in my tank and i want to hook this up to help with the ick infection. I've had it for a long time and i think the bulb is not good anymore. I got It from someone here but i'm having problems trying to take it off from the case. Does anybody have some experience in changing these bulbs on these UVs?? I'm afraid if I pull it to hard i will break it.

Thanks cor your help.