As I told you trying is a waste of time.
What happens, at least that's what I think happened for me, is that one busy day one wants to insert the disc fast without noticing that the iBook is in deep sleep, and something gets bended inside and the disc gets blocked. Some people manage to get it out again, or that's what they say at least, by inserting a stick in the right place. But as there are several models of those slotloading beasts, mine only got better stuck. I expect that I would be able to repair the drive if I got it out, but when I looked at the repair advices for iBooks I decided that I might not get the iBook together again. Also the exact model of slotloading drive isn't available anymore, and if it was, today it's as expensive as buying a Powerbook which is a lot more "screw driver friendly".
If you look at affordable second hand laptops, Macs will often have problems with the optical drive while this is seldom the case with PCs.
My iBook has a disc stuck inside, my Powerbook reads DVDs but won't read CDs and even my external FireWire drive didn't like most DVDs until I exchanged the inside with another that I pinched on a PC after upgrading the firmware on the PC.
But although my iBook tries to eject the disc every time it gets started or comes out of sleep, I've been using it like that every day for several years and I even don't notice the sound anymore.
If you really want to waste time, search the internet for advice, you'll find people having tried all sorts of things, sticks, credit cards, paper and glue, maybe you get lucky. But I'm happy that the days when I wanted to repair my iBook drive are well behind me.