Set aside your broom and head to your pantry for some bread. (Yes, bread.) Grab a few slices and use them to wipe us any remnants of the broken glass. And, for good measure, you can swipe a bit of peanut butter over the slice of bread afterward to seal in the glass.
Take some aluminum foil, ball it up into an appropriate scrubbing shape—if you will—and wipe it over the metal nozzle of the gun. Any burnt or stuck-on glue should come off with ease!