While not necessary, applying a mold release onto the mold before use is always recommended to ease demolding of the finished piece and help preserve the shiny finish of the mold. If a mold release is not available, rubbing baby oil into the mold cavities is an excellent and equally effective alternative!Avoid the use of sharp objects when cleaning or inserting charms/confetti into the mold as this can scratch and damage the mold.Silicone molds are only heat-resistant up to 450°F (232°C). Silicone molds have a risk of adhering to your resin piece if too much heat was applied to remove the bubbles. Do not use a torch to pop the bubbles as this will damage the mold. Unless a vacuum chamber is used, there will always be a few small bubbles! The best way to minimize bubbles is to warm the resin before mixing, and mixing slowly with a plastic stirring stick (it is not recommended to use wooden craft sticks as the porous surface creates small bubbles in the resin). Use a straw to blow the bubbles away, or use a regular BBQ lighter and do quick passes over the resin (do not stay in one place as this will overheat the resin and damage the mold).