- Stove/microwave to heat up water
- Extra old toothbrush
- Extra cup wider than your jar/ stove top pot
- One jar with label glue still stuck to it
- Dr. Bronner’s liquid soap
- Baking Soda
So I’ve read online about a few tricks of how people remove sticky labels off of glass jars. I’ve read about the method of using olive oil along with baking soda, and then there’s the method of heating up the glass and peeling off the label. I don’t like to use excess oil to clean, because when you wash off the jar, the oil can clog up your plumbing pipes, over time. I have tried to heat up my glass to peel off the label, but it doesn’t always peel off completely. There is one method I’ve stuck to for awhile, but I don’t see people posting about it. My method is pretty simple and it seems to work for me.
I will first peel off the label so that the only film left is the paper and glue. Some jars use a plastic/nylon label and some use paper labels. I like to get rid of the excess label before I start to remove the glue and label. By removing the extra thick layer of label, the jar cleaning process goes by quicker, without any hangups during the process.
After that, I find an extra cup that my jar will fit into. If you can’t find a jar, at least find a pot wide enough, where the jar can be placed horizontally, inside the pot and completely submerged under the water.
I then heat up water in my stove top kettle. I heat it up where the water is pretty hot to the touch, but not scalding hot. The water doesn’t need to be scalding hot to be honest. The idea here is that the water, mixed with the soap, will loosen up the glue.
I’ll then pour the heated water into the larger cup, in between the larger cup and the jar, and a little bit inside the jar. The heated water around the jar is to help loosen the glue off of the jar and the water inside the jar is to weigh it down. I pour enough water into the cup, so that the label and glue are submerged under the surface of the water.
I’ll then drop a few drops of Dr. Bronner’s Liquid Peppermint soap into the water around the jar. I’ll usually spin the jar in the cup a few times, so the liquid soap is distributed more evenly. The soap, mixed with the hot water will loosen up the glue.
After about 30 minutes, I’ll take the jar out of the soapy water. Please be careful, because your jar might still be very hot from being submerged in the water. If it is still too hot to handle, let it sit for a bit longer so the temperature of the water cools off . DO NOT run the hot glass jar under cold water to cool it down. This will likely lead to your glass jar cracking or exploding under the drastic temperature change.
NOTE: Glass expands when hot, contracts when cold. If the exterior surface of your glass jar cools, while the inside surface of your jar is still hot, that creates an uneven thermal profile. As a result, the surface of your jar is trying to shrink, but the hot inner glass prevents the surface glass from shrinking. This creates a powerful stress profile through the glass — the surface is trying to shrink, but can’t, so it is forced into tension. The hot core is trying to stay the same volume, but the surface is squeezing in, so the core undergoes compression. It’s not hard to figure out which section of glass wins the tug-of-war — the surface fails first. And a crack grows out of some microscopic scratch or flaw, growing and spreading until the stress is sufficiently relieved or the glass is broken clean through.
SO PLEASE DO NOT RUN COLD/COOL WATER OVER YOUR HOT JAR.
Once it is a bit cooler to the touch, I’ll use baking soda to scrub off the glue, using an old toothbrush. I’ll scrub in circular motion, and periodically dip the jar in the soapy water to rise it off as I scrub my way around the jar.
This method has worked for me, when I’ve needed to remove sticky labels off of glass jars.
Also remember, glue is not permanent on glass. So if you’re patient and allow the glue loosen up, and continue to scrub using the baking soda, than you’ll end up with a clean surface. Sometimes there might be a little bit of glue left, but just continue to scrub it off with the baking soda and soapy water.
This was a simple post, but it was a method that I realized I had never talked about, but always used. It’s just glue; it’s not permanent and it’ll come off.