I remodeled my home in 2020, including my kitchen with white cabinets. I was super excited to buy some wall flowers and plug them in! I put one under one of the cabinets as my best friend has always had hers plugged in there and low and behold it actually melted the bottom of the cabinet and now there is a big black spot. The last time I went to my friend's home I looked under her cabinet and sure enough, same thing so I told her since obviously she never noticed. Now, I have a brand new cabinet with a big ugly spot underneath. I am never going to use those wall flowers again. Concerned with what they are made of if it can do that. Would like my money back and would be nice if they would do something for my cabinet that is damaged.