Induction cups can be used indefinitely as long as you use proper care and maintenance. We recommend cotton swabbing nails after each use and cleaning them completely from time to time. The standard cups can be cleaned with the included cleaning cycle. Smooth ceramic and quartz cups can be torched clean or soaked in ISO alcohol. NO ATOMIZERS to ever replace on the Switch unit. Let me know if you have any other questions or concerns, I am always happy to help.