While cleaning I pulled my Whirlpool Dryer away from the wall and disconnected its 220v power cord. I immediately observed some corrosion and resistive heat damage to one of the prongs on the cord. I appears to started melting the hard plastic on the plug itself. The unit is a front loading dryer model no LE7680XSW1 with serial number M90870677. I am not sure on the date of manufacture, it is an older model. The date the damage was discovered on the plug was 6/10/21.