You can use soapy water as a mould release agent. Please store the resin moulds in room temperature place, avoid from the direct sunlight. Clean these silicone moulds with soapy water. These beautiful transparent silicone moulds make your casting easier and fun.A perfect choice for diy handmade lovers or those who are love to do crystal pendant jewellery making. It's very easy to use. Use your imagination, try to do some unique and special resin jewellery. You will get much fun and satisfaction of designing the appearance you want, . Clean: please clean the resin moulds with rubbing alcohol, and use a soft cloth to wipe clean. Please store the resin moulds away from direct sunlight and dust. Desmond: you can use a mould release spray. If you don't have, you may use a baby wipe or a drop of soap mix with a bit of water as a release agent, work it down to the mould, then push the project from the bottom. Please make sure your resin piece is fully cured.