I got one of those oil burners that holds a tea light candle on the bottom and has a glass bowl on top to put in a few drops of essential oil. The glass bowl has built up a brown residue from the burned up oil and I have tried everything to get it off, including rubbing alcohol and WD-40 but nothing has worked, does anyone know how to remove it?
You might also try soaking overnight in water with either some ammonia, or dishwasher detergent.
You will need to get an abrasive cleaner. Ajax or something like that. Otherwise, just use common household salt.
Try soaking in white vinegar and rinsing clean. If it cleans out a coffee maker should do the same for a glass diffuser
Heat a pan of vigenar and water to the temp the glass can handle, If that doesn't work then you can try Easy-Off oven cleaner.
