Why do we air-dry DNA pellet after isolation?

Air-drying a DNA pellet after isolation removes residual ethanol or isopropanol used in the precipitation process. This step is crucial because any remaining alcohol can interfere with downstream applications, such as PCR or sequencing, by inhibiting enzyme activity or affecting DNA concentration. Additionally, air-drying helps to concentrate the DNA, making it easier to dissolve in an appropriate buffer or water for subsequent use.