Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Damaged dashboard

I did not get this product on Amazon, instead had received it as a free promotional item. That said, I experienced many of the problems other reviewers had with the mat rolling up at the corners and bubbling up. For a free promotional product, that did not bother me so much. However after several months of not using it, I decided to remove the mat. It left a big greasy mark on my dashboard (textured hard black plastic). No cleaning or car-interior-specific products (or solvents) have been able to remove the stain. I am posting this review as a warning to others...prolonged use can damage the finish of your dashboard!! If anybody else has had the same experience and managed to get the stain out, let me know what you did!