Found a fix for fine powder sticking to the glass powder cup (at least for CFE 223). Tried using a dry Teflon spray to prevent sticking and that didn't work. Then tried Nu Finish car wax and that stopped the powder from sticking. I still have to tap the cup when it is upside down, but that does clear all the powder with one tap as opposed to bashing it 3 or 4 times untreated and still having powder stuck inside.