Came across 2 loose hangers while on 3 routes. Would have tightened but didn't have a wrench with.

What bolts? top anchors or bolts on the new mixed lines?

These were top anchors. One was at the new lower-angle area, it was on the set of anchors to the climbers left. The other one was the just left of Matrix in the corner, the anchor with the large stainless hooks. On both of these the nut attaching the hanger to the bolt was loose so I tightened as best I could with a gloved hand (ie, not very tight).

While not the ideal solution, the grooves of an ATC (where you put the bite of rope through) are usually the right size to tighten down a loose nut in a pinch