Where is this made in?
What, do you clean beside the barrel. On this rifle
Follow the recommended maintenance schedule that should come with the rifle. The rule of thumb is thoroughly clean inside the barrel when new before shooting and that's about it. If accuracy drops tremendously after several tins of pellets then probably time to clean it again.
Is there an after market trigger for the Ruger Yukon
No, but you can improve it somewhat. It's very similar to the Crosman trigger but nothing is interchangeable and the common mods won't work. I wouldn't hold my breath for an aftermarket trigger either, and if one is made I wouldn't expect much from it. I have a pix of the internals if interested; chevota at hotmail.
I understand that when cleaning this rifle, sometimes the cotton pad gets stuck in the baffles of the silencer. can you remove it when cleaning?
No you cannot remove it. I would recommend running a drinking straw into the end of the muzzle break and holding it in the gun while running your cleaning rod or pull through in the barrel. That will keep it from getting caught on the baffles.