求翻译：皮艺沙发相对其他材料的沙发来说，可能会比较难打理，所以其保养与清洁也有一定技巧。皮衣沙发在换季的时候可适当涂抹皮革柔软剂，保持其光泽。是什么意思？

Piyi sofa sofa, compared to other materials, may be more difficult to do, so its maintenance and cleaning there is a certain skill. Leather sofas leather softener may be appropriate to apply when in season, maintaining its luster.