i just gave my 2 1/2 week old DSE901 atomizer a bath. All i did was fill the sink up with warm water and sucked through the battery end of my e cig like a straw lol. I pushed the water back through and repeated the process. Filled it up with water, shook it a little and some black looking burn;t e liquid came out. I dried off with a hairdryer and it now works as good as new. Best atomizer so far. Other than cleaning it the one time, i have done nothing to it, never emptied out the atomizer/let it drain. WAHOO