Since I breed rats in a large quantity I may have a couple of tips. First of all rodents always run along walls rarely across open spaces, with their poor eyesight they need to be able to feel where they are going. Sticky traps suck, don't work. They collect dust and they can run across them. If you do manage to get him stuck to it, you have to kill the rat with a blunt object. You cannot rip them off, it will remove fur and skin. I prefer either catching them by hand, with a little coaxing and cornering. If that fails I either use snap traps or a bb gun (bb guns work for shooting PETA supporters too!). I would never use poison in your house has it will dehydrate them and they will die inside a wall. You will have to locate the awful smell they produce. If you can reach the rat the best thing really is to try to sneak up on it and pin it with your palm to the ground. Good luck!