How do you wash a heated blanket

Winter is gone! Many winter items are required to be washed this season. If you have a lovely heated blanket. How do you wash it? Any comment from you will get a coupon from Sojoy! Come on! Your idea! 

Sojoy | Machine washable 12V Heated Travel Electric Blanket for Car, Truck, Boats or RV with High/Med/Low Temp Control B07LBG3PFV B075V5KZPD B07J1YLFMQ