So how do you all keep the glass on the door of the MES's clean? I kind of figured that it would have smoke residue on it after each smoke but figured that I could easily wipe it clean each time. Today I did my first smoke and afterwards I wiped the inside down. I got most of the residue off the glass but there is still a lot at the bottom and around the edges. I really don't mind some residue but I can see that fairly quickly it will have the entire glass coated and it will be od little use. I know that using cleaning agents is a no-no, but what is the best way to get the residue off and then to keep it clean?