I use candle wax too but be ready for it to catch fire when you do. If you didn't know it would do this, it might make you think you've messed up. In reality, this is what you want it to do because it helps condense the junk on top making it easy to scoop out. The flame will quickly burn out.

People at Do It Corp told me to try it so I figured it must be okay but have to admit, I wasn't comfortable watching the melting pot I paid good money for catch fire.

From time to time, you may also need to clean the spout at the bottom. I use a paper clip and hold it with some pliers and ease it up underneath. This warms it up, I then roll it on a piece of candle wax and repeat. Usually pours much better after that.