"Specifications of portable handheld sensors available to the home user will include ratings of temperature accuracy (usually with measurement uncertainty of ±2 °C/±4 °F) and other parameters.
The distance-to-spot ratio (D:S) is the ratio of the distance to the object and the diameter of the temperature measurement area. For instance if the D:S ratio is 12:1, measurement of an object 12 inches (30 cm) away will average the temperature over a 1-inch-diameter (25 mm) area. The sensor may have an adjustable emissivity setting, which can be set to measure the temperature of reflective (shiny) and non-reflective surfaces.
A non-adjustable thermometer sometimes can be used to measure the temperature of a shiny surface by applying a non-shiny paint or tape to the surface, if the allowed measurement error is acceptable.
The most common infrared thermometers are the:
Spot Infrared Thermometer or Infrared Pyrometer, which measures the temperature at a spot on a surface (actually a relatively small area determined by the D:S ratio)."
Sounds like your best best is to paint a small area on your cookware that you can use to get accurate readings.