What is a disadvantage of infra-red heat touch screens?

The most accurate response regarding a disadvantage of infra-red heat touch screens highlights that these types of screens can be relatively expensive technology. Infra-red touch screens use an array of emitters and detectors to create an invisible grid of infrared light across the screen's surface. This setup involves advanced components and calibration, which can drive up manufacturing costs compared to other touch screen technologies such as resistive or capacitive touch screens.

While there are other potential disadvantages associated with infra-red touch screens, such as not allowing for input using gloved fingers or concerns about sensitivity in certain conditions, the cost aspect is uniquely definitive in terms of a technological barrier to widespread adoption and implementation.