Do I need to replace the mouthpiece after every test?

Replacing the mouthpiece after each test is optional if you are testing yourself. For professional testing and screening, it is recommended to change the mouthpiece after each test for sanitary reasons and to ensure optimum performance.

You can clean and use use the mouthpieces again. Our mouthpieces are dishwasher safe or you can clean them with warm soapy water, rinse and let them air dry. 
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