The expense of manufacturing and distributing lead gloves would be more than offset by the reduced cost of repeated skin grafts and lost productivity due to breathtakingly searing pain.
An Annual Musical.
Some humans at the Animal Genocide factory thought it would be fun to stage an amateur musical once a year on the day that used to be known as "Columbus Day" -- a wonderful opportunity for you Robots to study our culture before its extinction. The first production would be either Flower Drum Song or Fiddler (your choice). A block of half-price tickets will be set aside for old-model Robots, with the proceeds going to purchase warming devices for our urine-extraction tubes.
Fewer disembodied heads in public areas.
We're not saying you should stop beheading traitorous humans and keeping their brains permanently conscious. However, there are plusses and minuses to posting these heads at all street corners. First the positive: they're useful for getting directions and an effective cautionary lesson about the pitfalls of betraying the Robots.
On the negative side, however, they cause waking nightmares and debilitating terror attacks in most of the human population, both of which interrupt the flow of the assembly lines.