Hi, I moved into a house that has been re-wired in the last 5-10 years. 2 rooms have lights that sometimes work and sometimes don't. I took off the switch plate to see was it a loose connection (see attached) and everything looks tight. I also tried various new bulbs but same issue. Does this wiring look correct and does anyone have any ideas as to why the lights sometimes work only. Note, one of the switches seems to work better when firmly pushed at the same time but again the wires look tightly connected inside so I am lost as why it would make a difference pushing the plate harder. Any ideas would be appreciated!