If you have hard sugar that is not budging with a standard cleaning, there are a few things you can do to try and get it clean. First, use a toothbrush to scrub the surface of the sugar. Next, mix one cup of white vinegar with two cups of water and pour it over the sugar. Let it sit for five minutes before scrubbing it with a brush. Finally, pour 1 cup of boiling water over the sugar and let it sit for two minutes before scrubbing it with a brush. ..
