What Are These Pest Droppings?

After hearing that mice will avoid traps if they have the scent of human handling, I wore gloves when setting traps. In a small sampling, I found the traps more successful when gloves were used. Maybe there is something to that.
Also, does anyone know why mice eat the insulation on electrical wires? I’ve seen the evidence of this several times.

mice don’t seem to be as bothered by human scent, rats sure are bothered.

the plastic has a sweet taste.

Mice will eat damn near anything. I’ve had them eat my bath soap.

I moved into a newly built building that had a serious mouse problem. We tried all kinds of traps and baits and placements but those droppings continued unabated even though we caught a few mice a week. We finally opted for the definitive treatment - we got a cat. Within 2 weeks we were completely mouse-free and have remained so. If all else fails…

Not necessarily mouse droppings. Could also be roach droppings. They look identical except roach droppings will have horizontal lines on them.