Ability to clear result area of previous query execution.

At the company the I work for we use the playground through graphql-yoga to do our demo's when delivering to show our PM and PO our progress. On multiple occasions we have wanted to present using a fresh playground with only the queries prepared to be executed but sadly the caching system keeps everything in record and we show previous outcomes when running. We found two work arounds to this; first, simply copy pasting queries into a new playground tab, second, having the query fail and switch out and back to the tab and fix it (including killing the server and running the to fail). We believe that having the ability to clear a response on demand would be beneficial for development cycle as it provides targeted and intentional functionality through the website.