if it's just regular hot glue just rub it for a while with your thumb. It should eventually rub off then windex the area, that should clean it up quite nice.
will this work after some time has passed? it's not a recent occurrence, just one that needs fixed. And it's not like alump, more of a smear after I tried to wipe it off with a towel.
A smear might be harder to remove but I think it's still possible. I used this method to remove hot glue from my visor as well, but in my case it was a stray "string" that had some how gotten mashed down.