I reuse glass jars but really dislike labels so work to remove them. Some a soak in hot sudsy water and the label slips right off and some it is a sticky gooey mess. Well I had one of those today.
I wish I'd have taken a before picture to show it. I did a search for homemade goo remover and found this info. Mix baking soda and shortening or coconut oil. I did half and half. I really didn't expect this to work but it did. I rubbed it on left if for a bit came back and washed the jar and all the goo came right off. I will use this again and thought I would share in case you too need a goo remover for CHEAP!!!
I used about 1 tablespoon of baking soda and 1 tablespoon of a shortening - coconut oil mix.
As you can see below the jar came out great and no goo.