Before first use, or if the color appears faint, gently shake with the cap closed.
If the pen has been left with the tip pointing upward and the color does not flow well, leave it tip-down for a while before use, or check the color flow on the back of your hand. Gently wipe any foundation or other oily residue from the tip with a tissue. Close the cap firmly until it clicks; leaving the cap off may dry out the brush. Remove and replace the cap straight so the tip does not touch the sides of the cap.