Deletion of ratings in Web Experience

I am having an issue with giving the user the option to "wipe clean" or "nullify" ratings after they have given those ratings by hovering over them and clicking. Consider the classic 5-star rating. Once the user assigns a rating by hovering and clicking, then can change it to any number of stars by repeating the process, but what if they want to take it away altogether? My current solution is to give a border and a "delete cross" on the top right corner so they can just wipe it clean by clicking on the cross. But i am open to suggestions.

Please see below