Aaron was to do this for the first time, but afterwards any priest might do it, as appears from Luke 1:9; this not being done in the holy of holies, which was the high priest's peculiar. When he dresseth the lamps, i.e. cleansed them, and prepared them for the receiving of the new light.
Related Commentaries of Exodus 30:7
Exodus 30:7
7 And Aaron shall burn thereon sweet incensec every morning: when he dresseth the lamps, he shall burn incense upon it.