I noticed that you are using plastic clamps throw them in the garbage put your molds in a regular vice or clamped them with the steel vice or put them back together with the screws that come with it and give it a shot plastic clamps do not hold your molds tight is they should be I know because I've got about four pairs of them that I don't use also for people starting out I do not recommend the clamps of made out of plastic that they are selling on most of the mold sites is I've had the same problem time after time though I know were going to hear about it here probably some a guy say they never had a problem but I do not recommend using plastic clamps and I bet you $1 million what I told you it will work.