5 Tips to avoid wet spots
Wash your glass and dry thoroughly before using to ensure there isn't any kind of film or build-up
Make sure the room where your candles are curing is not too cold.
Preheat your glassware in a warm oven or with a heat gun. This will allow the candles to set as slowly as possible.
Pour the wax slowly into the container to avoid air bubbles from being created.
Tap your jar gently after pouring to help release any air bubbles.