Remove any visible debris around the stopper
Lift the stopper handle or knob if present
Twist the stopper counterclockwise if it is threaded
Pull the stopper straight up while gently wiggling it
Press down and release the stopper if it is a push-pull type
Unscrew the pivot rod nut under the sink if it is a pop-up stopper
Slide the pivot rod out to free the stopper
Lift the stopper out from the drain opening
Use pliers with a cloth if the stopper is stuck
Apply a small amount of lubricant if needed
Clean the drain opening after removal