Using silicone molds helps make your popsicles easy to remove. However, if you're still having trouble try these tips. You must make sure that your popsicles had sufficient time to freeze first. Then once they're completely frozen, run the outside of the mold under cold water for a few seconds. This should help loosen the pops. Hold the stick and wiggle back and forth a bit to pull them out while running the mold under cold water. Don't use warm water or you could risk melting your treats.