If you notice bubbles forming, you can get a lot of these out by using a hair dryer or heat gun used for rubber stamp embossing. I used a heat gun and got a lot (though not all) of my bubbles to disappear. I think the heat gun is better than a hair dryer because the end is narrower and more concentrated than a dryer which can blow stuff all over the place. Just do a little at a time because the heat can melt your plastic mold.
Now, for the hardest part of the entire process - wait for it to dry or cure! Temperature, humidity, and size of the molds are all factors that cause the drying time to vary, but at a minimum you'll want to wait 24 hours on up to 72 hours.
