you used acetone on the dash? That stuff will eat right through vinyl and plastic, it's a nasty bugger
. That's probably why it's not adhering properly. For plastics, use an ammonia-based cleaner like Parson's Ammonia or I like to use Simple Green water-based cleaner. Once you clean it, scrub it down with very fine or extra fine #240-#500 sandpaper to remove any loose particles.