Removing a sink stopper can be a bit tricky but usually involves just a few steps. First, check under the sink for a horizontal rod connected to a vertical strap—this is part of the stopper mechanism. Typically, you'll need to unscrew the nut holding the rod in place, which allows you to lift the stopper out from above. What type of sink stopper are you dealing with? Perhaps a pop-up or a lift-and-turn? I'm here to help if you need more specific guidance!