Don't think that's a good idea. I did it once some time ago (not a c42 but still an Epson) When I finally got to cover off all sorts of springs and cog wheels flew out all over the place. As I then couldn't put it back together again it had to go in the bin and I bought a new one.
Yes, it is still under warranty, but is still working OK. It appears that a black cartridge has been leaking in the rest position and there is quite a spillage of ink, I wanted to clean it up but the top cover has to be removed to do so. By what I can see it requires a number of wedges to be inserted around the case to unlock the catches. I wondered if anyone has done this.
this was a tip from another forum member a few days ago regarding moving the printer head when the ink doesnt need replacing.turn on the printer and the head will move to the side just as it does so pull out the power.you should now be able to get a cloth into where the head sits in the parked position.ive a c42 plus and just tried it.