The software solution
Quite a few cameras have a software based “dust deletion” feature. These generally work by first taking a blank frame which the camera uses to record the position of any dust particles on the sensor. This information can then be used (normally during RAW processing) to automatically clone out dust spots on the image. If you’re stuck in the field without the chance to do a sensor cleaning and you know you have a problem, then using this software solution can save you a lot of work later manually cloning out each dust spot on each image.