As the wax cools, it forms those little indentations on top, like little sink holes. I think it's because of the soy content. I don't like that look on my tarts either so I pour them halfway, wait a little for them to harden, and then do a second pour. Gets them nice and smooth on top, but it is a little more time consuming. I think candlemakers use heat guns to smooth out the tops but I've never tried that with tarts. I agree with other posters.. heat your wax to a higher temp. Add the fragrance oil between 180 - 185. Let it cool to 140-150 before pouring. Also, there is a tutorial somewhere (Candle Tech?) of how to add a spigot to the bottom of a Presto Pot. Then you don't have to worry about dipping in and out and having the wax cool too much. My wax goes from the spigot directly to a hot pouring pot, so it's nice and easy and doesn't cool off too much. It's easy to get frustrated in the beginning, but just keep at it!