I know this thread is about lube, but I thought I'd share my method for taking down and reassembling theR9s. You need only reasonable grip strength for this.
Hold the pistol in your left hand with fingers over the top of the barrel and thumb through the trigger guard (muzzle will be pointing left). Pull the slide back until the pin hole lines up with the pin. Squeeze with your left hand, which holds the slide aligned with the pin. Tap the pin out enough to lock the slide. Then retract and hold the slide enough to free the pin, which should be able to be removed with your right hand's fingers. Reassembe in reverse.
Musician