As regards the thermodetector, the relative humidity of the air has a considerable impact on the results obtained. We have demonstrated that the storage of cottons has no effect on entomological-related stickiness measured using the thermodetector. In addition, a study on the number of neps on 20 tex ring spun yarn showed that there was a strong relation between the number of sticky points on the thermodetector and the number of fiber neps.