I have a hard time using anything with 'smells' so I try a more organic approach first. If it is a small enough piece (or a kid's shirt with stuff on it!), try freezing it. Then it is usually easy to scrape off the hardened glue. If the item has no grease in it and is a wax base, try ironing it with a brown sack on top. As it heats, it should be absorbed into the bag. Neither of these are foolproof and are a bit harder, but they are chemical free.