The container wasn't preheated. Heat the container in a warm oven (130-150°F) before pouring.

The wax was too cool. Pour when the wax is 155-175°F.

The candle was burned for short periods of time. Burn the candle for at least 1 hour per inch in diameter.

The meltpoint of the wax is too high. Use a wax with a low meltpoint suitable for containers, such as Calsoy CB3.

The wick is too small. Use the proper sized wick for the diameter of the container.

The wax has a high oil content or too much fragrance oil was added. Vybar 260 will help the wax hold more oil, if you are using parafin wax.

Not enough vybar was used. Depending on the amount of fragrance oil used, add ½ to 1 teaspoon of vybar 260 per lb. of wax.

If you are using Soy wax, this can also be a function of the brand of soy wax you use. Some manufacturers pride themselves on this look -- they consider it to be an "antique" look. Some candlemakers actually prefer it. If you do not, try different brands.

The wick is too small. Use the proper sized wick for the diameter of the candle.

Too much or the wrong type of additives were used. Use the least amount of additives necessary for the desired effect. Do not use additives that will harden the wax. Additives are not recommend for soy waxes.

The wick is too large. Use the proper sized wick for the diameter of the candle.

The wick needs trimming. Keep the wick trimmed to ¼".

There is a draft. Don't burn the candle in a drafty area.

The wick is too small and won't consume the melted wax quickly enough. Use the proper sized wick for the diameter of the container.

Too much dye or fragrance oil was used. Solids in some dyes and fragrance oils may clog the wick if too much is added.