Yes grease or spray your molds, or use freezer paper. Soak your loofa in hot water, let the water out and bang out the seeds really well, let the loofa drain while you get everything ready, you want them damp but not wet. Now put them into your PVC, some will slide right in others you have to squish them into themselves to get them in, no biggy either way. Now make your soap, non darkening soap or GM only near trace works best, otherwise it's so dark you can't see the loofa when you cut. Pour your soap at very light trace. Place a wash rag over the top of the PVC and bang it down or tape it with something on the side to settle the soap and get out the bubbles in the loofa sponges. Be careful the lid on the bottom will not hold the weight of the soap! I then put plastic wrap over the top of my tubes, which are in a 5 gallon bucket, I stuck towels amoungst the tubes and over it to insulate it. I don't even look at it for 36 hours. If they won't come out freeze them for about 20 minutes....let them set for another 12 hours...mine is a castile (all olive) so perhaps this is the reason I have to let mine set. Cut through them about 1 to 1.5 inches with a serated knife...my husband can just press through them with a regular knife, Ican't. While he cuts I mold the soap back over the places where the knife snags the loofa. Let set, the longer the cure the better with these. Mine are about 3 ounces when done and still sell for $5 eaisly. Vicki