1. Work the slide and put the safety 'on'.
2. Remove the magazine.
3. Hold the pistol by the grip with your right hand, and with the left hand gripping the barrel, depress the takedown button located at the forward end of the frame back into the frame & lift the barrel straight up as the barrel stud loosens.
You now have a barrel and a frame with the slide/striker intact, = push the slide forward out of the frame tracks and you will have the 3 component parts of the weapon, adequate for cleaning.
If you have to disassemble the frame/trigger or slide further, I'd find a competent gunsmith..... I've had more than 25,000 rounds through mine & have never had to completely disassemble the weapon past the 3 component
groups.
