Check the knob for a small release slot, pinhole, or detent on the shaft or neck
Insert a paperclip, pin, or small flat tool into the release slot
Press the release while pulling the knob straight off
Look for a hidden set screw on the side or underside of the knob
Loosen the set screw with the correct Allen wrench
Pull the knob off once the set screw is loose
Pry off the decorative trim plate or cover ring with a flat screwdriver
Remove any exposed mounting screws under the trim plate
If there are spring clips, depress them with a flat tool and slide the knob free
If the knob is a push-in style, twist the knob while pulling outward
Remove the latch faceplate screws on the edge of the door
Pull the latch assembly out of the door edge
If the knob still will not come off, check for a snap ring or retaining clip and remove it with pliers
Reassemble by reversing the removal steps if needed