No! Mosie syringes and Mosie cups are single-use only. Mosie, like any syringe, is comprised of moving parts that may become compromised after even a single-use. There is also a risk of infection if not cleaned properly. The rubber stopper specifically (on any syringe) loosens after each use and will eventually become unreliable. The stopper on Mosie (and most syringes) is also very lightly coated with a medically safe lubricant to ensure smooth movement which will likely deteriorate after washing.
You will find that Mosie is not alone here. Most manufacturers discourage using any syringe multiple times. This is exactly why we include two Mosie syringes in every kit and we offer a subscription option. More tries translates into better odds for conception!
For these reasons we do not recommend reuse and are not liable to any outcomes from multiple uses.
Hope this provides a bit of insight and please do email us at mosie@mosiebaby.com if any other questions come up that we can help with!