The lower spray arm consistently comes out of its socket during wash and leaves dishes dirty. Does the glass trap need replacing? Doesn't seem like anything snaps permanently into place (i.e. spray arm can be easily lifted out of place with one hand)

My suspicion is parts 30 and 34 in this diagram

Please advise!

Thanks for the reply! I tried rotating but it doesn't snap at all, nor does it look there is any hardware / tabs that would catch on rotation -- either on the tray or the trunk of the spray arm. Doesn't look like there ever was, either. The tray just sits in the drain holding the tube in place, but pops out along with the spray arm at the slightest nudge / lift.

Any other suggestions? Would more photos help?

Thanks for the help! No tabs, and nothing looking like it snapped off?? I managed to wedge some rubber tabs between the edge of the glass trap and the drain and it seems to be holding everything in place (and cleaning properly) for now. If/when this temporary fix fails, I'll look into replacing Item 5...