I went to change the bottle of scent and the oil had seeped through the unit, it was black around the plugs and on the wall outlet. To me, this is a fire hazard. I got these as a Christmas gift. But on the label it says it was sold at Walmart. I would like to know what I should do with these? I have 5 of the Plug-ins and 5 bottles of oil. I can be reached at [protected]. My name is Debra Brown. Address is: 12463 Grosstown Rd. Hughesville, MD 20637 Email address: [protected]@yahoo.com Thank you in advance for addressing this issue. I will be waiting to hear from you.