Works, but smells

My cat has not left this heating mat since I plugged it in. He's 14 and this really helps with his arthritis, especially during the cold months. But, I've noticed there has been a slight chemical/burning/artificial smell wafting from the pad whenever its heated up. Note: This doesn't bother my cat in the slightest, he could care less. The smell is only noticeable if you put your face up to it. Bit concerned by this but haven't seen any skin issues or anything like that on the cat so will continue using.

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