Measure out a capful of Isopropyl alcohol
Dip q-tip head into the cap and moderately soak.
Gently swipe q-tip along sides of CCN chamber, being sure to clean all lazer/camera portals.
Next swipe q-tip along the bottom of the chamber, being sure to clean any seen residue.
Remove chamber lid from its hook on the CCN door.
Using fresh soaked q-tip, clean along the sides bearing O-rings.
When done wait till alcohol to evaporates before operating CCN.