And thou shalt offer every day a bullock for a sin offering for atonement: and thou shalt cleanse the altar, when thou hast made an atonement for it, and thou shalt anoint it, to sanctify it. Thou shalt cleanse the altar - The altar was to be sanctified for seven days; and it is likely that on each day, previously to the consecration service, the altar was wiped clean, and the former day's ashes, etc., removed.
Related Commentaries of Exodus 29:36
Exodus 29:36
36 And thou shalt offer every day a bullock for a sin offering for atonement: and thou shalt cleanse the altar, when thou hast made an atonement for it, and thou shalt anoint it, to sanctify it.