Washing Electric under blanket

[disneylover367]

The label on my dreamland under blanket says 40 on it, but I don't understand how its safe to wash because of the electric plug which is attached. Ive had it one winter and always assumed it could only be spot cleaned. Has anyone washed in machine and safely used after?

It says to detach the control thingy, so the plug. The internal wire isn’t an electric lead, it just heats from the cable being attached.

Electric blankets contain a series of thin electrical wires embedded inside the fabric. When the blanket is plugged in and switched on, these wires activate and heat the surrounding fabric and bed

Thank you that's really helpful. Into the machine it goes!