Cartridges can be reused if properly sanitized (soak in 70% isopropyl alcohol for 10 minutes, then air-dry needles-up). The needle cartridge can be used for up to a month if cleaned after each use. However, over time the needle head may become blunt and, if not cleaned thoroughly, unsanitary.
For this reason, many customers prefer to replace cartridges after about 3 uses to ensure maximum effectiveness and safety. For smoother, more consistent results, a fresh cartridge is always recommended.
If you’d like extra cartridges, you can purchase them here: