Always unplug the blanket before you get into bed unless it has a thermostatic control for safe through the night use.
Replace the electric blanket if it becomes soiled, frayed or worn – especially if wires or scorch marks are visible. Always replace it with a new one after 10 years and have it serviced every 3 years by a competent electrician (contact the retailer for further information). Never buy second-hand electric blankets and always ensure there’s a current safety standard mark displayed on the product itself.

 

Electric blanket safety logos.

Electric blankets should not be used if you experience incontinence issues even if you wear pads at night.
Never use an electric blanket if you are also using a dynamic airflow mattress. If you use emollient skin creams, try to avoid letting excess cream dry onto the blanket as it will facilitate any fire that occurs making it burn faster and hotter. 
When not in use, store the electric blanket rolled up loosely to prevent damaging the internal wiring.