This is a wonderful gel eyeliner and is a holy grail product for me. I have tried countless gel eyeliners including MAC, Calvin Klein and Elizabeth Arden and not one has beaten Maybelline's version in lasting power, ease of application and price point.
To stop this from drying out, simply pour a thin layer of water on top of the gel after every use and screw the lid up tightly. Pour the water out before you next use it. It will keep as fresh and moist as it was the day you bought it.