Candles that claim to be "all natural" and "100% Soy" can have a natural frosting or whitening effect. It does not affect the scent or burn-ability of the candle. This is how you know your candle is 100% soy.
The shrinking of the candle in a container where you see the candle lifting from the container is known as wet spots. It is not wet but looks like air between the wax and the container. This is a natural occurrence that even the high priced candles sometimes have happen. It does not affect the scent or burn-ability of the candle.
The longer the candle burns the larger the melting pool. Target is to have the wax melt all around the container.
Always keep the wick trimmed to about 1/4". This will help eliminate soot build up on the container and burn very clean.
Burn the candle on the first burn until there is a full melt pool all around the container. This insures great hot scent throw and will also insure the candle will burn this way for every use.
Tunneling happens when the candle only melts around the wick and the wax at the edge of the container does not melt. You will not get a favorable hot scent throw when this happens. On the very first burn make sure the wax melts all around the container. This is considered the memory of soy wax. It will help in the process of future full melting pools with each use.
The first burn may take 6-8 hours to realize the full melt pool. It will take 2-4 hours after the first burn to get the full melt pool which is where you get the full hot scent throw.