Car CD-Player makes noise/doesn't eject CDs. I have a Clarion DXZ545MP car receiver. Recently it

Question

I have a Clarion DXZ545MP car receiver. Recently it does not eject CDs. It makes a repeated clicking sound as if the mechanism can't move & then gives up. I opened it up (past the point of no return even though I don't know what the h**l I'm doing; I usually could just disassemble electronics & put 'em back together and they magically start working again). The mechanism will eject the CD if I press upwards on that whole gear array. I'm guessing the sound is the gears slipping or something.Does anyone have any info on how to troubleshoot car CD players? Or what my problem could be? I've heard of the term "limit switch" mentioned through searches on here, but cant' seem to find it on my receiver.How do I clean my car cd player when it dosnt take in a cd?