Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Melts

I have purchased two of these, both black. Both have melted after about one year of use. I tried contacting the company via their website, but to no avail. I like the design, and the fact that I don't have to have it permanently attached to my windshield, but the product should be able to withstand the heat of the sun since that is where it is supposed to be.