By any chance - did your recipe call for paraffin?? If it did - substitute shortening for it! Paraffin has a lousy taste! Originally many years ago paraffin was used to give the chocolate a shiny look (for presentations sake) - well phooeey on that - who wants to eat paraffin wax??? Crisco shortening can give you better results and it won't leave that horrid taste in your mouth!!
OH YUCKY!!!