Yes heating works.
just put a pot of water on the stove and but it on low put the bottle in and allow it to heat up a bit. No need to boil water just a little heat and in a few min. it will be gone. I have done it in the past. if it is in an oil base it is better but if it is in water it precipatates out heavy and you have to heat it everyother day just about to keep it dissolved.