If you do a search on the carpet cleaning forum you will see there loads we use, i use alltecs chewing gum remover, another one i tried recently is made by sulotions its not as effective but its less potent as you wouldnt want to be working with the alltec one for long.
There is loads and loads you can use you just apply and scrape of, they come in liquid form, gel, or spray cans.
Another product thats meant to work well wich im sure you will have easy access to is white spirit.