CE4 ATOMIZER CLEAROMIZER ATOMISER TANKS E SHISHA 510 EGO THREAD CLEAR. Filling up your CE4 clearomizer is fairly straightforward. You can fill a CE4 with a standard drip tip e-liquid bottle. Hold the CE4 clearomizer at a 45 degree angle and begin dripping e-liquid along the inside wall of the unit until it is filled to just below the bottom of the rubber cover inside of the unit.