Possible Clues:

• Greenland has one
• Would electric blanket melt it?
• Arctic covering
• It contains cheese spread to make a slippery surface
• The majority of Antarctica
• Don't expect polar bear to use this in bed to keep warm from frost layer
• Greenland cover
• You could slip over to first person getting in touch with Clare for bed linen
• Floater on the Arctic Ocean (2 words)
• Extensive frozen layer