@jowen you can clean the atomizer by running hot water
through it and blowing out from the top a few times then plug into your battery and dry burn till you see the coil glowing red. Once it starts glowing release the button and repeat as many times as necessary till there are no more fumes coming out of the atty.
As for flavors i would not recommend phoon huat although they are cheap. They mostly taste and/or smell like burning plastic to me when vaped.