Your pour temp is too high. The lower the pour temp is the less of a hole you have but be careful cause then other complications can arise from lower pour temps.
@Daniel3359 I think if you don’t know what a true preservative is and you don’t realize that everything is a chemical. You should probably get outside help when developing something that is supposed to protect your skin from the harmful rays of the sun. Regardless if it is aimed to be synthetic or natural.