1. First, remove the stains on the buffalo horn scraping board by hand.
2. Drop a few drops of essential oil on the scraping board.
3. Apply the essential oil evenly on the scraper, so that the scraper can be isolated from the air, which can be preserved for a longer time.
4. Finally, put the scraping board into a plastic bag and seal it.
Note: glycerin can be used instead of essential oil.