How do you clean your nails?

As I've said in many posts, I got put on antidepressants recently and it's been pretty life-changing. It has pretty much entirely stopped my extreme lifelong habit of nail-biting overnight. I was such an extreme nail biter that when I ran out of nail I'd move to the cuticles, I was almost always bleeding from my fingers, and one of them was always liable to be infected. This is a good thing, however my nails are now longer than they've ever been, and because I've been nail-biting for so long I never had to worry about it. I have no fucking clue how to get shit out from under my nails without hurting myself, and as a heavy smoker that's absolutely horrible and disgusting. How do you guys clean your nails?