Light switch loud popping noise
I just changed all light switches to the newer 1"x3" style rockers. Two different brands of switches make a loud popping noise at random when you turn on or off the light. At first, I thought it was because I used the "stab" method of connecting the wires, but have since terminated the wires with the screw mounts. The noise is at the switch.
Both switches are grounded to the ground wire. When I used the stab method, a different switch (and one of the same ones) made noise. Now one of the original ones and a different one makes this noise. Out of all of the light switches I replaced so far, these are the only two making the noise (one single pole and one three way) out of a total of 27 switches.
I cannot reproduce this noise at will.
Any advice would be appreciated.