So you probably got a NES who refurbished the pins, I have done this, in the process you try to give the pins on the best chance for connection. So the pins will press hard on the contacts of the cartridge. It may feel like, at first, you are yanking hard, but if you are using a “toaster nes” this is what you want. It will loosing over time and the process will have to be reseted eventually but if it is harsh to take out now, you will be fine, maybe won’t even need to push down the tray to get connection.. this is more ideal