https://www.youtube.com/watch?v=mxf2kS8DWQg
Recording began on February 13 and was completed in six days. For most songs the band recorded their basic instrumental tracks together. Occasionally the drums were recorded separately in a kitchen for its natural reverb (very ape and Tourette). Then Cobain added additional guitar tracks, and finally vocals. The initial mix of In Utero took five days. Sometimes the band took some day off to watch nature videos, set things on fire and make prank calls (1:00:48) The sessions were completed on February 26.