Wait five or ten minutes to allow the heat from the washcloth to transfer to the glass. Remove the washcloth and gently attempt to remove the stopper. You can tap lightly with a wooden spoon on the sides to loosen it. [1] X Research source
Try this if the stopper is small and recessed enough into your decanter to allow you access to drip water into the space. If it is not, you can run hot water over the entire area to loosen it. Gently tap the sides of the stopper with a wooden spoon to loosen it. Do not use a metal spoon or other metal object, as it may break the glass. [2] X Research source
Keep the decanter in the hot water for about 10 minutes. Add more hot water if it becomes cool. You can even let it soak overnight if it doesn’t come loose. [3] X Research source Remove the decanter from the water and attempt to remove the stopper. Tap gently with a wooden spoon at the sides of the stopper to loosen it.
You only need to use a small amount of oil. Heat it to a temperature that is comfortable to the touch.
Try using a medicine dropper to pour the oil more precisely into the small gap, or pour the oil liberally over the area for the chance for some of it to drip inside. Leave the oiled decanter to sit in a warm place, like in the kitchen while cooking, to allow the oil to stay warm and loosen the stopper.
Tap the sides of the stopper with a wooden spoon or another object that won’t break the glass to loosen it. Note that the oil may drip into the contents of the decanter, so it may need to be disposed of. The stopper and the neck of the decanter should also be cleaned to remove the oil.
Use a damp cloth without any other cleaner to gently wipe down the decanter and stopper. You can also try wrapping a piece of paper around the stopper before placing it in the decanter in order to store it for a long period of time. [5] X Research source
Fill the empty decanter with warm, soapy water and two tablespoons of uncooked rice. Swirl the mixture periodically over 30 minutes to remove stubborn stains, then rinse thoroughly with warm water. [6] X Research source You can also try a small amount of vinegar, baking soda, or denture cleaner in water to clean the inside. Always make sure to rinse thoroughly with just water afterwards. [7] X Research source
Keeping the decanter in a relatively warm and humid place may help keep it loose and lubricated. Use the water or oil methods of loosening the stopper every so often during storage so that it does not become more stuck over time.