If you have less time and prefer to use machine then do the machine wash on delicate comforter sets for beds and never use hot water. Water at room temperature is perfect. 30 degree Centigrade (86 degrees Fahrenheit) is the exact as per the experts. This water is barely lukewarm. Also never use extra spin cycle in washing machine for drying the luxury bed linen. If possible then go for the natural dry on clothesline away from direct sunlight.
However, hand wash is always safer and better than the machine wash to your modern bedding sets.