I cleaned the mags and stretched the mag springs a little. The slide locks back now when checking it at home (unfired). I read the sticky note about making the little tool but am confused how to use it. The sticky said to move the tool towards the hammer which is confusing because it looks like the notch would just slip off the spring? I've re-read it and now understand the idea is to pivot the tool back to tweak the spring a little.
I read another post about putting in stronger mag springs.