Tried searching this topic but could not find anything on it but I know this has come up before. When I make a POP mold, the bottom comes out perfect. No residual bubbles. after it dries for a day, I apply a small amount of Vaseline to aid in demolding. I Mix the POP/water 2:1 and slowly mix. Before I pour the mix into the mold to make the top half, I tap the cup to get rid of bubbles. I pour the mix and tap to make the bubbles rise. I demold after a day. there are a ton of fairly large bubbles. I have tried using a thinner mix with the same results. How do I get rid of these bubbles?