GSP sticky cover

I have a Rand McNally GPS that has a sticky cover tried everything to fix ,but nothing worked. Was going to send it in or buy new one, last chance idea. I used a product called (AWESOME) spayed some on a rag and rubbed and wiped off with clean rag and it all came off clean as could be, sticky free. It now is like new , can buy product at dollar store and I saw it at Lowes ,$6.00 a gallon. Used only on black cover not screen. Try it really works again wet rag and keep wiping then dry.