Maybe I was not careful enough so I need to feel some small gaps on kit. So, blame on my side, not on kit, kit is so precise. Note on second image small towel. It is so called wet towel, most known use is for travel and baby care. I take out one, let it dry and use it to clean kit surface. Just pour a bit of liquid (in this case airbrush cleaner) and it greatly clean of surface, better then anything else. Cotton and paper could leave some traces and particles of material, this one not. Recommend, try it.