If I was an elf I would clean the reindeer by washing them brushing them then washing them down with water.I would brush them everyday.I would use the best brush in the world.Next I would wash the reindeer with soap twice a day.I would use the best soap in the North Pole .Then I would water them down three times a day.As you know I’d use the smoothest coldest water.As you can see it would be very hard but fun.