This may seem like a dumb question, but why is the part so resin rich? The advice in the above posts are good, you def need to add perf release but on the other side, don’t assume that if the release is in there the job will be much more easier to peel out the flow media. If you are drawing to much resin into the part and not clamping off at the right time, depending on the size of the part, where the lines are placed etc…can all add to the job of getting it out of the mould and having a usable piece.
Let the vacuum do the work for you…