CUSTOMER SERVICE PROBLEM

Call customer service, and ask them to send another.  Yours sounds defective.  Then when the new one comes, it will have a sticker to ship back the old one.  They are really very good about exchanges, as long as they are in a timely manner.  Good Luck!

 I have this item and love it.  I have not had any problems with vibration.    And I have tried mine on several different surfaces.  

    You might try a thin piece of rubber or latex like a shelf liner and see if that corrects the problem..

  Hope you can get it corrected. or maybe send it back as defective.  You know maybe if it vibrates that much it could possibly overheat.