I have only been doing this a short time. I have been seeing dimples like places in some of the jigs after I take them out of the mold....I have a 40 cavity and 10 cavity mold I am seeing it in both. it is not the same cavity and sometimes it is at the bottom part of the mold and sometimes it is at the top half and some times it is on the left side of mold and other on the right....I have tried heating the molds before I inject them. still does it. could any one give me any tips on what I can try........thanks