history: I stepped in gum someone spit on the side walk I stepped in gum someone spit on the side walk today. Were you able to get it off of your shoe? Only some of it. 
current: Keep working at it, you'll get it all. Try ice on it to harden the gum first.
next: That's a good idea.  My biggest problem was trying to get most of it off with nothing on me.   I had to drive home and didnt' want gum all over my truck