Why does my electric underblanket make static shocks?

Small static shocks can happen with heated bedding in dry conditions, and this does not always mean the blanket is faulty. The manuals explain that static is more likely when indoor humidity is low and that cotton bedding can help reduce it. fileciteturn0file5turn0file10

1. Check whether the room is very dry. Expected result: static is more common in dry air, especially in winter or in heated rooms.
2. Try cotton sheets and remove synthetic layers from the immediate bed surface. Expected result: static should be reduced if fabric friction is the cause.
3. Make sure the blanket lies flat and is not rubbed repeatedly by loose bedding. Expected result: fewer creases and less friction can reduce the shocks.
4. Test again after improving room humidity where practical. Expected result: static should lessen if dry air was the main cause.
5. If the shocks are strong, repeated or come with visible damage, stop using the product. Expected result: a blanket that shocks persistently should not be treated as normal.

Do not continue to use the blanket if static is accompanied by heat spots, smell or any electrical fault. If the issue remains unresolved or safe use is uncertain, contact the retailer or store where it was purchased. fileciteturn0file5turn0file10turn0file11