Drain plug is stuck in the base

If the appliance is new: contact SteamOne or the retailer to replace the base of the appliance. If the appliance is already in use: Carry out the draining procedure using white vinegar: Fill the tank with 1/3 white vinegar and 2/3 water, turn on the device (making sure not to put any clothes near the diffuser head), and let the tank drain.