What should I do if the oil seal palette of oil painting has been dry for a year?

Soak in hot water According to the information of xiaohongshu APP, soak the dried palette in hot water for 20 minutes, scrape it gently with a painting knife, and then clean it with turpentine. Oil painting is a painting made of quick-drying vegetable oil (linseed oil, poppy seed oil, walnut oil, etc.). ) mixed with pigments on canvas (linen), cardboard or wood.