PerkinElmer has received US Patent No. 7,521,245, "Method for washing and drying pins in microarray spotting instruments." The patent claims an apparatus that includes an array of chambers, each for receiving one of the pins of a spotting instrument. To wash the pins, streams of wash fluid are directed at the pins. To dry the pins, a gas is flowed over pin surfaces. Pins can therefore be washed and dried without having to be moved, the patent states.