Give it a day. After you've done the fill-rest-check routine, keep the pod upright and at room temperature. If it doesn't leak within 24 hours, you're good.

Want a faster check? Fill a pod, rest it, then hold it upside down over a tissue for ten seconds. If it's dry, the seal is holding. If it weeps, you've got a worn seal or a crack.

One more thing: keep the device upright when you're not using it. Lying it on its side in a bag is a recipe for a slow drip that you'll only notice when your pocket feels damp.