Problems with Litter box training

Hello all, I'm new to these forums and I need advice.
I have two 4 year old male ferrets. I've had them for a couple years now, and while one has no problems with litter box training, the other still rarely uses it. He's picked a corner he wants to poop in, and will go there regardless of what I've put there. I've tried putting a bed there, I've put his food and water bowl there, and he still poops there. I will have just cleaned the cage very thoroughly and he'll go right to that corner and poop, forcing me to clean the cage again.
This behavior is driving me nuts to the point where I have considered giving them away on several occasions. 
Any advice is appreciated.

What is preventing you from putting a litter pan in that corner?

Worst case, put newspapers in the corners where he likes to poop.  Easier than cleaning the cage.  we have a ferret nation cage but can't decorate it with liners and stuff because we have 2 fuzzies that get mad when we put them up ad they don't want it, and they will poop outside the boxes.  We have papers in most corners of the house because they don't always se the boxes outside the cage

THE DOOKS OF HAZARD

jojoish: This isn't really an option. It's one of the upper level shelves, and it's only about 6-8 inches wide. I have the two level Ware cage, with the doors on the side. If I put a litter box in that corner, my choices would be never being able to open that door, or having the litter box pushed over constantly. This is even if a litter box would fit, which I am doubtful of.




unclejoe: I'm not sure how this fixes the problem. The liquid would seep through the newspaper, and upon repeated use it just becomes a bigger mess to clean up. It also doesn't discourage them from using that corner, which is more of what I was aiming for. I'm not sure your suggestion to put newspaper outside the cage will be helpful since the problem is when he is inside the cage. After I lost the first thousand in security deposits I only let them out in a ferret-proofed bathroom.

You'd have to use several layers of paper, or preferably puppy pads.  They are more absorbent and have a plastic lining that prevents seeping through.  You could cut them to fit the shelf.  
Can you post a pic of your cage?  The ware cages I'm seeing look pretty small for a ferret.  Our ferret nation is big enough for litter boxes on 3 levels, which they need because they're lazy when they wake up in the middle of the night.

THE DOOKS OF HAZARD

You might also try a small litter box. I know ferrets generally dislike not being able to have their entire body in a box, but it might either deter the ferret from using the corner (have you tried corner guards?) or catch most of the accident anyway. I think they're for like rats and stuff, like the large corner boxes for ferrets but much smaller.