Remove the rubber cap and the white gasket with a hole in it. Looking inside the cartomizer you can see a white filling, this is where the liquid goes. The hole in the center needs to be kept free of liquid. Hold the cartomizer at a slight angle and drip liquid down the side wall and into the filling. Allow time for the drops to be absorbed. The cartomizer will hold about 25-30 drops of liquid on a first fill. When full, the inside will look like a wet sponge.

Remove any pooled liquid from the top of the cartomizer with a tissue to avoid it getting into your mouth while vaping. Replace the rubber white gasket as a stand in mouthpiece, or use a drip tip for the mouthpiece if you have one. Screw the cartomizer onto the device. (For the BUD PRO the docrative cone screws on over the cartomizer)

Press the button to activate the unit and fire the cartomizer (or simply inhale with the BUDecig automatic battery). Release the button when not vaping. When flavor and vapor production begin to drop off, refill the cartomizer with additional drops.

Average duration for a full charge is between 4-6 hours (for BUD PRO) and between 2-4 hours (for BUDecig). Recharge time is around 2 hours for a completely drained battery. 

To recharge, gently unscrew the cartomizer and cone (for BUD PRO). Then screw the battery into the charging port. The LED light will change from red, while charging, to green when fully charged. Remove the battery from the charger immediately after the charge is complete.

When necessary, use a tissue paper to clean the cartomizer shaft or battery top in order to remove moisture.